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Appendix I. Subsidiaries (fully-consolidated companies) (million euro) (Details) - EUR (€) | 1 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2024 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Disclosure of subsidiaries [line items] |  |  |  |
Investments in associates accounted for using equity method | € 3,023,000,000 | € 3,023,000,000 | € 2,038,000,000 | € 1,951,000,000
Assets |  | 28,999,000,000 | 26,318,000,000 |
Liabilities |  | 20,879,000,000 | 20,439,000,000 |
Revenue | 9,147,000,000 | 9,147,000,000 | 8,514,000,000 | 7,551,000,000
Profit (loss) |  | € 3,490,000,000 | 511,000,000 | 305,000,000
IRB infrastructure developers limited [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in associate |  | 19.86% |  |
Investments in associates accounted for using equity method | 315,000,000 |  | 376,000,000 | 377,000,000
407 International Inc [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in associate |  | 43.23% |  |
Investments in associates accounted for using equity method | 778,000,000 |  | 928,000,000 | 1,063,000,000
JFKNTO sponsor aggregator LLC [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in associate |  | 49.00% |  |
Investments in associates accounted for using equity method | 1,006,000,000 |  | 471,000,000 | 235,000,000
Corporation division [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Revenue | 520,000,000 |  | 506,000,000 | 466,000,000
Construction division [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Revenue | 7,234,000,000 | € 7,234,000,000 | 6,869,000,000 | 6,280,000,000
Profit (loss) |  | 258,000,000 | 98,000,000 | 65,000,000
Toll roads division [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Revenue | 1,256,000,000 | 1,256,000,000 | 1,085,000,000 | 780,000,000
Profit (loss) |  | € 663,000,000 | 548,000,000 | 157,000,000
Toll roads division [Member] | 407 International Inc [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in associate |  | 43.23% |  |
Toll roads division [Member] | JFKNTO sponsor aggregator LLC [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in associate |  | 49.00% |  |
Airports division [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Revenue | 91,000,000 |  | 80,000,000 | 54,000,000
Energy and mobility infrastructures division [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Revenue | € 270,000,000 |  | 207,000,000 | 191,000,000
SPAIN |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Revenue |  | € 1,582,000,000 | 1,475,000,000 | 1,154,000,000
SPAIN | Corporation division [Member] | Ferrovial Inversiones, S.A. (a) [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 2,000,000 |  |
SPAIN | Corporation division [Member] | Ferrovial Emisiones, S.A. (a) [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
SPAIN | Corporation division [Member] | Ferrovial Corporación, S.A. (a) [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 5,000,000 |  |
SPAIN | Corporation division [Member] | I Ferrofin, S.L. (a) [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 52.00% |  |
Net cost ownership |  | € 40,000,000 |  |
SPAIN | Corporation division [Member] | II Ferrofin, S.L. (a) [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 48.00% |  |
Net cost ownership |  | € 33,000,000 |  |
SPAIN | Corporation division [Member] | Temauri, S.L. (a) [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 5,000,000 |  |
SPAIN | Corporation division [Member] | Ferrovial 011, S.A. |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
SPAIN | Corporation division [Member] | Ferrovial 012, S.A. |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
SPAIN | Corporation division [Member] | Ferrovial 013, S.A. |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
SPAIN | Corporation division [Member] | Ferrovial 014, S.A. |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
SPAIN | Corporation division [Member] | Ferrovial Venture VI, S.A.U. (a) [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 6,000,000 |  |
SPAIN | Corporation division [Member] | Ferrovial Ventures, S.A.U. (a) [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 15,000,000 |  |
SPAIN | Corporation division [Member] | Ferrovial 009, S.L.U (a) |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
SPAIN | Corporation division [Member] | Ferrovial 015, S.L. |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
SPAIN | Corporation division [Member] | Ferrovial 016, S.L. |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
SPAIN | Corporation division [Member] | Ferrovial 017, S.L. |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
SPAIN | Corporation division [Member] | Ferrovial 008, S.L.U (a) |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
SPAIN | Construction division [Member] | Via olmedo pedralba sa [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in associate |  | 7.20% |  |
Investments in associates accounted for using equity method |  | € 1,000,000 |  |
Assets |  | 5,000,000 |  |
Liabilities |  | 2,000,000 |  |
Revenue |  | 5,000,000 |  |
Profit (loss) |  | € 0 |  |
SPAIN | Construction division [Member] | Boremer S.A. [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in associate |  | 50.00% |  |
Investments in associates accounted for using equity method |  | € 1,000,000 |  |
Assets |  | 2,000,000 |  |
Liabilities |  | 1,000,000 |  |
Revenue |  | 0 |  |
Profit (loss) |  | € 0 |  |
SPAIN | Construction division [Member] | Conc. Prisiones Lledoners,S.A. (a) [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 16,000,000 |  |
SPAIN | Construction division [Member] | Cadagua, S.A. (a) [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 99.95% |  |
Net cost ownership |  | € 70,000,000 |  |
SPAIN | Construction division [Member] | Cocsa, S.A. (a) [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 99.95% |  |
Net cost ownership |  | € 8,000,000 |  |
SPAIN | Construction division [Member] | Ditecpesa, S.A. (a) [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 99.95% |  |
Net cost ownership |  | € 1,000,000 |  |
SPAIN | Construction division [Member] | Ferroconservación, S.A. (a) [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 99.00% |  |
Net cost ownership |  | € 19,000,000 |  |
SPAIN | Construction division [Member] | Ferrovial Construcción, S.A. (a) [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 99.99% |  |
Net cost ownership |  | € 386,000,000 |  |
SPAIN | Construction division [Member] | Ferrovial Medio Ambiente y Energía, S.A. (a) [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 99.95% |  |
Net cost ownership |  | € 1,000,000 |  |
SPAIN | Construction division [Member] | Ferrovial Railway S.A. (a) [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 98.80% |  |
Net cost ownership |  | € 0 |  |
SPAIN | Construction division [Member] | Urbaoeste, S.A. (a) [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 99.00% |  |
Net cost ownership |  | € 0 |  |
SPAIN | Construction division [Member] | Cimentaciones Especiales y Estructurales CIMSA, S.A. |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 99.00% |  |
Net cost ownership |  | € 0 |  |
SPAIN | Construction division [Member] | Arena Recursos Naturales, S.A.U. (a) [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
SPAIN | Construction division [Member] | I Depusa Aragón S.A. (a) [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 51.70% |  |
Net cost ownership |  | € 2,000,000 |  |
SPAIN | Construction division [Member] | II Depusa Aragón S.A. (a) [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 42.30% |  |
Net cost ownership |  | € 0 |  |
SPAIN | Construction division [Member] | Tecpresa Structural Solutions, S.A. (a) [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 99.10% |  |
Net cost ownership |  | € 2,000,000 |  |
SPAIN | Toll roads division [Member] | Bip & drive sa [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in associate |  | 25.00% |  |
Investments in associates accounted for using equity method |  | € 6,000,000 |  |
Assets |  | 38,000,000 |  |
Liabilities |  | 13,000,000 |  |
Revenue |  | 18,000,000 |  |
Profit (loss) |  | € 4,000,000 |  |
SPAIN | Toll roads division [Member] | Empresa de mantenimiento y explotación m30 sa [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in associate |  | 50.00% |  |
Investments in associates accounted for using equity method |  | € (34,000,000) |  |
Assets |  | 238,000,000 |  |
Liabilities |  | 238,000,000 |  |
Revenue |  | 37,000,000 |  |
Profit (loss) |  | € 10,000,000 |  |
SPAIN | Toll roads division [Member] | Madrid calle 30 S.A. [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in associate |  | 20.00% |  |
Investments in associates accounted for using equity method |  | € 56,000,000 |  |
Assets |  | 730,000,000 |  |
Liabilities |  | 169,000,000 |  |
Revenue |  | 158,000,000 |  |
Profit (loss) |  | € 68,000,000 |  |
SPAIN | Toll roads division [Member] | Cintra Infraestructuras Spain, S.L. (a) [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 101,000,000 |  |
SPAIN | Toll roads division [Member] | Cintra Inversora Autopistas de Cataluña, S.L. (a) [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
SPAIN | Toll roads division [Member] | Inversora Autopistas de Cataluña, S.L. (a) [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
SPAIN | Toll roads division [Member] | Cintra Inversiones, S.L.U. (a) [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
SPAIN | Toll roads division [Member] | Cintra Servicios de Infraestructuras, S.A. (a) [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 99.99% |  |
Net cost ownership |  | € 0 |  |
SPAIN | Toll roads division [Member] | Autopista Alcalá-O'Donnell, S.A. (a) [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 3,000,000 |  |
SPAIN | Toll roads division [Member] | Autovía de Aragón, Sociedad Concesionaria, S.A. [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 55.00% |  |
Net cost ownership |  | € 23,000,000 |  |
SPAIN | Toll roads division [Member] | Pilum sa [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 94.10% |  |
Net cost ownership |  | € 0 |  |
SPAIN | Toll roads division [Member] | Ferrovial Aravia, S.A. [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 55.00% |  |
Net cost ownership |  | € 1,000,000 |  |
SPAIN | Toll roads division [Member] | Autema, S.A. (a) |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 76.30% |  |
Net cost ownership |  | € 426,000,000 |  |
SPAIN | Toll roads division [Member] | II Autovía de Aragón, Sociedad Concesionaria, S.A. |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 30.00% |  |
Net cost ownership |  | € 15,000,000 |  |
SPAIN | Toll roads division [Member] | III Autovía de Aragón, Sociedad Concesionaria, S.A. |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 15.00% |  |
Net cost ownership |  | € 3,000,000 |  |
SPAIN | Toll roads division [Member] | II Ferrovial Aravia, S.A. |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 30.00% |  |
Net cost ownership |  | € 1,000,000 |  |
SPAIN | Toll roads division [Member] | III Ferrovial Aravia, S.A. |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 15.00% |  |
Net cost ownership |  | € 0 |  |
SPAIN | Toll roads division [Member] | Azalia, Sp.z.o.o. |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 8,000,000 |  |
SPAIN | Airports division [Member] | Ferrovial Aeropuertos España, S.A. (a) |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 28,000,000 |  |
SPAIN | Energy and mobility infrastructures division [Member] | Siemsa Control y Sistemas S.A.U. (a) [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 1,000,000 |  |
SPAIN | Energy and mobility infrastructures division [Member] | Ferrovial Infraestructuras Energéticas, S.A.U. (a) [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 21,000,000 |  |
SPAIN | Energy and mobility infrastructures division [Member] | Parque Solar Casilla, S.L.U. (a) [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 9,000,000 |  |
SPAIN | Energy and mobility infrastructures division [Member] | Ferrovial Mobility, S.L. (a) [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 15,000,000 |  |
SPAIN | Energy and mobility infrastructures division [Member] | Cea Infraestructuras Energéticas (a) [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
SPAIN | Energy and mobility infrastructures division [Member] | Jucar Infraestructuras Energéticas (a) [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
SPAIN | Energy and mobility infrastructures division [Member] | Pisuerga Infraestructuras Energéticas, S.A.U. (a) [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
SPAIN | Energy and mobility infrastructures division [Member] | Ferrovial Growth VI, S.L. (a) [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 10,000,000 |  |
SPAIN | Energy and mobility infrastructures division [Member] | Roland Servicios Empresariales, S.L.U. |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 15,000,000 |  |
SPAIN | Energy and mobility infrastructures division [Member] | Ferrovial 004, S.A. (a) [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 17,000,000 |  |
SPAIN | Energy and mobility infrastructures division [Member] | Ferrovial Transco España , S.A.U. (a) |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 14,000,000 |  |
SPAIN | Energy and mobility infrastructures division [Member] | Ferrovial Energía S.A. (a) |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 16,000,000 |  |
UNITED KINGDOM |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Revenue |  | € 809,000,000 | 771,000,000 | 708,000,000
UNITED KINGDOM | Corporation division [Member] | Ferrocorp UK Ltd. [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 1,000,000 |  |
UNITED KINGDOM | Corporation division [Member] | Ferrovial Ventures, Ltd. [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 7,000,000 |  |
UNITED KINGDOM | Construction division [Member] | Ferrovial Construction (UK) Limited [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 9,000,000 |  |
UNITED KINGDOM | Construction division [Member] | Ferrovial Construction Holdings Limited [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 74,000,000 |  |
UNITED KINGDOM | Construction division [Member] | FC Civil Solutions Limited [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
UNITED KINGDOM | Toll roads division [Member] | Sociedad Concesionaria Anillo Vial, S.A. |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in associate |  | 35.00% |  |
Investments in associates accounted for using equity method |  | € 14,000,000 |  |
Assets |  | 0 |  |
Liabilities |  | 0 |  |
Revenue |  | 0 |  |
Profit (loss) |  | € 0 |  |
UNITED KINGDOM | Toll roads division [Member] | Zero by pass holdings ltd [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in associate |  | 35.00% |  |
Investments in associates accounted for using equity method |  | € 0 |  |
Assets |  | 0 |  |
Liabilities |  | 0 |  |
Revenue |  | 0 |  |
Profit (loss) |  | € 0 |  |
UNITED KINGDOM | Toll roads division [Member] | Zero bypass Ltd [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in associate |  | 100.00% |  |
Investments in associates accounted for using equity method |  | € 13,000,000 |  |
Assets |  | 944,000,000 |  |
Liabilities |  | 908,000,000 |  |
Revenue |  | 36,000,000 |  |
Profit (loss) |  | € 3,000,000 |  |
UNITED KINGDOM | Toll roads division [Member] | River linx holdings ltd [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in associate |  | 22.50% |  |
Investments in associates accounted for using equity method |  | € 0 |  |
Assets |  | 0 |  |
Liabilities |  | 0 |  |
Revenue |  | 0 |  |
Profit (loss) |  | € 0 |  |
UNITED KINGDOM | Toll roads division [Member] | RiverLinx Ltd [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in associate |  | 100.00% |  |
Investments in associates accounted for using equity method |  | € 65,000,000 |  |
Assets |  | 1,820,000,000 |  |
Liabilities |  | 1,528,000,000 |  |
Revenue |  | 204,000,000 |  |
Profit (loss) |  | € 7,000,000 |  |
UNITED KINGDOM | Toll roads division [Member] | Cintra Silvertown Ltd [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 1,000,000 |  |
UNITED KINGDOM | Toll roads division [Member] | Cintra Infrastructures UK Ltd [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 42,000,000 |  |
UNITED KINGDOM | Toll roads division [Member] | Cintra Toowoomba Ltd [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
UNITED KINGDOM | Toll roads division [Member] | Cintra Slovakia Ltd [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 1,000,000 |  |
UNITED KINGDOM | Toll roads division [Member] | Cintra OSARS Western Ltd [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 23,000,000 |  |
UNITED KINGDOM | Airports division [Member] | Faero UK Holding Limited [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 255,000,000 |  |
UNITED KINGDOM | Airports division [Member] | Ferrovial Airports International, S.E [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 1,372,000,000 |  |
UNITED KINGDOM | Energy and mobility infrastructures division [Member] | Ferrovial Services Netherlands B.V. [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 26,000,000 |  |
UNITED KINGDOM | Energy and mobility infrastructures division [Member] | Thalia Waste Treatment B.V. |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 1,000,000 |  |
UNITED KINGDOM | Energy and mobility infrastructures division [Member] | Ferrovial Energy US, LLC [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 13,000,000 |  |
UNITED KINGDOM | Energy and mobility infrastructures division [Member] | Ferrovial Energy US 1, LLC [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
UNITED KINGDOM | Energy and mobility infrastructures division [Member] | Thalia Waste Management Limited [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 50.00% |  |
Net cost ownership |  | € 0 |  |
UNITED KINGDOM | Energy and mobility infrastructures division [Member] | Thalia MK ODC Limited [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
UNITED KINGDOM | Energy and mobility infrastructures division [Member] | Thalia AWRP ODC Limited [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
UNITED KINGDOM | Energy and mobility infrastructures division [Member] | Thalia WB HoldCo Limited [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
UNITED KINGDOM | Energy and mobility infrastructures division [Member] | Thalia WB ODC Limited [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
UNITED KINGDOM | Energy and mobility infrastructures division [Member] | Thalia WB Services Limited [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
UNITED KINGDOM | Energy and mobility infrastructures division [Member] | Thalia WB SPV Limited [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
UNITED KINGDOM | Energy and mobility infrastructures division [Member] | Thalia IOW SPV Limited [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
UNITED KINGDOM | Energy and mobility infrastructures division [Member] | Thalia Services Limited |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
UNITED KINGDOM | Energy and mobility infrastructures division [Member] | Thalia MK HoldCo Limited [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
UNITED KINGDOM | Energy and mobility infrastructures division [Member] | Thalia MK SPV Limited [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
UNITED KINGDOM | Energy and mobility infrastructures division [Member] | Thalia Ventures Limited [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
UNITED KINGDOM | Energy and mobility infrastructures division [Member] | Thalia IOW ODC Ltd [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
UNITED KINGDOM | Energy and mobility infrastructures division [Member] | Thalia Holdco Ltd [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
UNITED KINGDOM | Energy and mobility infrastructures division [Member] | Alto Huemul Transmisión SPA |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
UNITED KINGDOM | Energy and mobility infrastructures division [Member] | Alto Huemul II SPA |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
UNITED KINGDOM | Energy and mobility infrastructures division [Member] | Misae Solar IV |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 66,000,000 |  |
UNITED STATES |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Revenue |  | € 3,271,000,000 | 2,879,000,000 | 2,906,000,000
UNITED STATES | Corporation division [Member] | Landmille US LLC [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
UNITED STATES | Corporation division [Member] | Ferrovial IT US, LLC [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
UNITED STATES | Construction division [Member] | ConnectedWorks, LLC |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in associate |  | 40.00% |  |
Investments in associates accounted for using equity method |  | € 0 |  |
Assets |  | 0 |  |
Liabilities |  | 0 |  |
Revenue |  | 0 |  |
Profit (loss) |  | € 0 |  |
UNITED STATES | Construction division [Member] | Pepper lawson horizonIntl group [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in associate |  | 70.00% |  |
Investments in associates accounted for using equity method |  | € 0 |  |
Assets |  | 0 |  |
Liabilities |  | 0 |  |
Revenue |  | 1,000,000 |  |
Profit (loss) |  | € 0 |  |
UNITED STATES | Construction division [Member] | Ferrovial Construction East, LLC [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 457,000,000 |  |
UNITED STATES | Construction division [Member] | Cadagua US LLC [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 14,000,000 |  |
UNITED STATES | Construction division [Member] | Ferrovial Agroman 56, LLC [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 35,000,000 |  |
UNITED STATES | Construction division [Member] | Ferrovial Agroman Indiana, LLC [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
UNITED STATES | Construction division [Member] | Ferrovial Construction Texas, LLC [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 74,000,000 |  |
UNITED STATES | Construction division [Member] | Ferrovial Construction US Corp. [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 1,010,000,000 |  |
UNITED STATES | Construction division [Member] | Ferrovial Construction US Holding Corp. [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 1,168,000,000 |  |
UNITED STATES | Construction division [Member] | I Grand Parkway Infrastructure LLC [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 30.00% |  |
Net cost ownership |  | € 0 |  |
UNITED STATES | Construction division [Member] | II Grand Parkway Infrastructure LLC [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 40.00% |  |
Net cost ownership |  | € 0 |  |
UNITED STATES | Construction division [Member] | Ferrovial Energy Solutions, LLC [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
UNITED STATES | Construction division [Member] | Webber Infrastructure Management US Inc. |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 308,000,000 |  |
UNITED STATES | Construction division [Member] | Webber Infrastructure Management Inc. |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 39,000,000 |  |
UNITED STATES | Construction division [Member] | Ferrovial Construccion JFK T1 LLC [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
UNITED STATES | Construction division [Member] | Sugar Creek Construction LLC [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 70.00% |  |
Net cost ownership |  | € 64,000,000 |  |
UNITED STATES | Construction division [Member] | I Trinity Infrastructure LLC [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 40.00% |  |
Net cost ownership |  | € 0 |  |
UNITED STATES | Construction division [Member] | II Trinity Infrastructure LLC [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 60.00% |  |
Net cost ownership |  | € 0 |  |
UNITED STATES | Construction division [Member] | North Tarrant Infrastructures [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 25.00% |  |
Net cost ownership |  | € 0 |  |
UNITED STATES | Construction division [Member] | II North Tarrant Infrastructures [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 75.00% |  |
Net cost ownership |  | € 0 |  |
UNITED STATES | Construction division [Member] | California Rail Builders [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 80.00% |  |
Net cost ownership |  | € 0 |  |
UNITED STATES | Construction division [Member] | Ferrovial Construction West, LLC [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
UNITED STATES | Construction division [Member] | I Bluebonnet Constractor, LLC [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 40.00% |  |
Net cost ownership |  | € 0 |  |
UNITED STATES | Construction division [Member] | II Bluebonnet Contractor, LLC [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 60.00% |  |
Net cost ownership |  | € 0 |  |
UNITED STATES | Construction division [Member] | DBW Construction LLC. [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € (2,000,000) |  |
UNITED STATES | Construction division [Member] | I PLW Waterworks LLC [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 50.00% |  |
Net cost ownership |  | € 0 |  |
UNITED STATES | Construction division [Member] | II PLW Waterworks LLC [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 50.00% |  |
Net cost ownership |  | € 0 |  |
UNITED STATES | Construction division [Member] | Webber Materials, LLC |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 88,000,000 |  |
UNITED STATES | Construction division [Member] | W.W. Webber, LLC [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 653,000,000 |  |
UNITED STATES | Construction division [Member] | Webber Barrier Services [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 5,000,000 |  |
UNITED STATES | Construction division [Member] | Webber Commercial Construction LLC [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
UNITED STATES | Construction division [Member] | Webber Equipment & Materials LLC [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 227,000,000 |  |
UNITED STATES | Construction division [Member] | Webber Management Group LLC [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 41,000,000 |  |
UNITED STATES | Construction division [Member] | FAM Construction LLC (I-66) [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 70.00% |  |
Net cost ownership |  | € 337,000,000 |  |
UNITED STATES | Construction division [Member] | Webber Infrastructure Management Holding US Corp |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € (3,000,000) |  |
UNITED STATES | Construction division [Member] | Tecpresa Structural Solutions, LLC |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
UNITED STATES | Construction division [Member] | North Perimeter Contractors LLC |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 387,000,000 |  |
UNITED STATES | Construction division [Member] | Webber united LLC |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 60.00% |  |
Net cost ownership |  | € 0 |  |
UNITED STATES | Toll roads division [Member] | Cintra ITR LLC [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 49.00% |  |
Net cost ownership |  | € 78,000,000 |  |
UNITED STATES | Toll roads division [Member] | Cintra Holding US Corp [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 22,000,000 |  |
UNITED STATES | Toll roads division [Member] | Cintra Texas Corp [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € (22,000,000) |  |
UNITED STATES | Toll roads division [Member] | Cintra US Services LLC [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 1,000,000 |  |
UNITED STATES | Toll roads division [Member] | Cintra LBJ LLC [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 303,000,000 |  |
UNITED STATES | Toll roads division [Member] | Cintra NTE LLC [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 240,000,000 |  |
UNITED STATES | Toll roads division [Member] | Cintra NTE Mobility Partners Segments 3 LLC [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 4,000,000 |  |
UNITED STATES | Toll roads division [Member] | Cintra Toll Services LLC [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
UNITED STATES | Toll roads division [Member] | Cintra I-77 Mobility Partners LLC [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 142,000,000 |  |
UNITED STATES | Toll roads division [Member] | Cintra 2 I-77 Mobility Partners LLC (2) [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 66,000,000 |  |
UNITED STATES | Toll roads division [Member] | Cintra 2 I-66 Express Mobility Partners [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 679,000,000 |  |
UNITED STATES | Toll roads division [Member] | I-66 Express Mobility Partners LLC [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 1,437,000,000 |  |
UNITED STATES | Toll roads division [Member] | Cintra 3I-66 Express Mobility Partners LLC [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 200,000,000 |  |
UNITED STATES | Toll roads division [Member] | Cintra 3 I-77 Mobility Partners LLC [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 104,000,000 |  |
UNITED STATES | Toll roads division [Member] | Cintra Digital Business Ventures LLC [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
UNITED STATES | Toll roads division [Member] | Cintra North Corridor Transit Partners, LLC |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
UNITED STATES | Toll roads division [Member] | I-77 Mobility Partners Holding LLC [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 50.10% |  |
Net cost ownership |  | € 108,000,000 |  |
UNITED STATES | Toll roads division [Member] | II I-77 Mobility Partners Holding LLC [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 15.00% |  |
Net cost ownership |  | € 68,000,000 |  |
UNITED STATES | Toll roads division [Member] | I-77 Mobility Partners LLC [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 218,000,000 |  |
UNITED STATES | Toll roads division [Member] | LBJ Infrastructure Group Holding LLC [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 54.60% |  |
Net cost ownership |  | € 0 |  |
UNITED STATES | Toll roads division [Member] | LBJ Infrastructure Group LLC [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 521,000,000 |  |
UNITED STATES | Toll roads division [Member] | NTE mobilitypartners holding [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 63.00% |  |
Net cost ownership |  | € 240,000,000 |  |
UNITED STATES | Toll roads division [Member] | NTE mobility partners [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 322,000,000 |  |
UNITED STATES | Toll roads division [Member] | NTE mobility partners segments 3 holding LLC [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 53.70% |  |
Net cost ownership |  | € 276,000,000 |  |
UNITED STATES | Toll roads division [Member] | NTE mobility partners segments 3 LLC |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 436,000,000 |  |
UNITED STATES | Toll roads division [Member] | I-66 Express Mobility Partners Holdings LLC |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 50.00% |  |
Net cost ownership |  | € 0 |  |
UNITED STATES | Toll roads division [Member] | II Cintra ITR LLC |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 44.00% |  |
Net cost ownership |  | € 23,000,000 |  |
UNITED STATES | Airports division [Member] | JFKNTO sponsor aggregator LLC [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in associate |  | 51.00% |  |
Investments in associates accounted for using equity method |  | € 1,006,000,000 |  |
Assets |  | 10,436,000,000 |  |
Liabilities |  | 8,547,000,000 |  |
Revenue |  | 68,000,000 |  |
Profit (loss) |  | € 7,000,000 |  |
UNITED STATES | Airports division [Member] | Ferrovial Airports Holding US Corp [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 799,000,000 |  |
UNITED STATES | Airports division [Member] | Ferrovial Airports O&M Services LLC [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
UNITED STATES | Airports division [Member] | Ferrovial Airports US Terminal One LLC. [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 734,000,000 |  |
UNITED STATES | Airports division [Member] | MARS NTO LLC. [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 96.10% |  |
Net cost ownership |  | € 742,000,000 |  |
UNITED STATES | Airports division [Member] | Ferrovial Airports CHS MSA LLC |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
UNITED STATES | Energy and mobility infrastructures division [Member] | Ferrovial Mobility U.S., LLC [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 1,000,000 |  |
SAUDI ARABIA | Construction division [Member] | Ferrovial Agroman Company [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 97.50% |  |
Net cost ownership |  | € 3,000,000 |  |
AUSTRALIA | Construction division [Member] | Ferrovial Construction (Australia) PTY LTD [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 46,000,000 |  |
AUSTRALIA | Toll roads division [Member] | Nexus infrastructure holdings unit trust [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in associate |  | 40.00% |  |
Investments in associates accounted for using equity method |  | € 3,000,000 |  |
Assets |  | 18,000,000 |  |
Liabilities |  | 0 |  |
Revenue |  | 0 |  |
Profit (loss) |  | € 0 |  |
AUSTRALIA | Toll roads division [Member] | Nexus infr unit trust toowoomba [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in associate |  | 100.00% |  |
Investments in associates accounted for using equity method |  | € 10,000,000 |  |
Assets |  | 37,000,000 |  |
Liabilities |  | 16,000,000 |  |
Revenue |  | 37,000,000 |  |
Profit (loss) |  | € 3,000,000 |  |
AUSTRALIA | Toll roads division [Member] | Nexus infrastructure holdings pty ltd [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in associate |  | 40.00% |  |
Investments in associates accounted for using equity method |  | € 0 |  |
Assets |  | 0 |  |
Liabilities |  | 0 |  |
Revenue |  | 0 |  |
Profit (loss) |  | € 0 |  |
AUSTRALIA | Toll roads division [Member] | Nexus Infrastructure PTY Ltd |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in associate |  | 100.00% |  |
Investments in associates accounted for using equity method |  | € 0 |  |
Assets |  | 0 |  |
Liabilities |  | 0 |  |
Revenue |  | 0 |  |
Profit (loss) |  | € 0 |  |
AUSTRALIA | Toll roads division [Member] | Netflow osars western gp [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in associate |  | 50.00% |  |
Investments in associates accounted for using equity method |  | € 38,000,000 |  |
Assets |  | 151,000,000 |  |
Liabilities |  | 74,000,000 |  |
Revenue |  | 25,000,000 |  |
Profit (loss) |  | € 3,000,000 |  |
AUSTRALIA | Toll roads division [Member] | Cintra OSARS (Western) Holdings Unit Trust [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 23,000,000 |  |
AUSTRALIA | Toll roads division [Member] | Cintra OSARS Western Unit Trust [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € (3,000,000) |  |
AUSTRALIA | Toll roads division [Member] | Cintra Developments Australia PTY, Ltd [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 1,000,000 |  |
AUSTRALIA | Toll roads division [Member] | Cintra OSARS (Western) Holdings PTY Ltd [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
AUSTRALIA | Toll roads division [Member] | Cintra OSARS Western PTY Ltd [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
BRAZIL | Construction division [Member] | Constructora Ferrovial Ltd. (Brasil) [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 99.00% |  |
Net cost ownership |  | € 1,000,000 |  |
CANADA |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Revenue |  | € 246,000,000 | 161,000,000 | 100,000,000
CANADA | Construction division [Member] | Ontario transit groupInc [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in associate |  | 50.00% |  |
Investments in associates accounted for using equity method |  | € 0 |  |
Assets |  | 1,046,000,000 |  |
Liabilities |  | 1,078,000,000 |  |
Revenue |  | 409,000,000 |  |
Profit (loss) |  | € 0 |  |
CANADA | Construction division [Member] | Ferrovial Construction Canada Inc. [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 66,000,000 |  |
CANADA | Construction division [Member] | Webber infrastructure management canada holdings ltd [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
CANADA | Construction division [Member] | Webber Infrastructure Management Alberta Ltd |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
CANADA | Construction division [Member] | Webber Infrastructure Management Canada Ltd |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 6,000,000 |  |
CANADA | Construction division [Member] | Webber Infrastructure Management Ontario Limited |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 30,000,000 |  |
CANADA | Construction division [Member] | Ontario Transit FCCI (Hold Co) Inc. |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
CANADA | Toll roads division [Member] | 407 International Inc [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in associate |  | 43.20% |  |
Investments in associates accounted for using equity method |  | € 778,000,000 |  |
Assets |  | 3,866,000,000 |  |
Liabilities |  | 8,029,000,000 |  |
Revenue |  | 1,151,000,000 |  |
Profit (loss) |  | € 467,000,000 |  |
CANADA | Toll roads division [Member] | Cintra 4352238 Investments INC |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
CHILE | Construction division [Member] | Constructora Ferrovial Ltda. [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 97.20% |  |
Net cost ownership |  | € 0 |  |
CHILE | Construction division [Member] | Ferrovial Construcción Chile S.A. [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 63,000,000 |  |
CHILE | Construction division [Member] | Ferrovial Empresa Constructora Ltda [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
CHILE | Construction division [Member] | Siemsa Chile S.P.A [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
CHILE | Toll roads division [Member] | Cintra Infraestructuras Chile SpA [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
CHILE | Toll roads division [Member] | Cintra Infraestructuras Perú, S.A.C |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 99.90% |  |
Net cost ownership |  | € 0 |  |
CHILE | Toll roads division [Member] | Ferrovial MAD 01, S.A. |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 91,000,000 |  |
CHILE | Energy and mobility infrastructures division [Member] | BXF Energía SP. z.o.o. |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 51.00% |  |
Net cost ownership |  | € 7,000,000 |  |
CHILE | Energy and mobility infrastructures division [Member] | Ferrovial Power Infrastructure Chile, SpA [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 65,000,000 |  |
CHILE | Energy and mobility infrastructures division [Member] | Ferrovial Transco Chile II SpA [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
CHILE | Energy and mobility infrastructures division [Member] | Transchile charrúa transmisión sa [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 99.90% |  |
Net cost ownership |  | € 0 |  |
CHILE | Energy and mobility infrastructures division [Member] | Ferrovial Transco Chile III SPA [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
CHILE | Energy and mobility infrastructures division [Member] | Ferrovial Transco Chile IV SpA [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
CHILE | Energy and mobility infrastructures division [Member] | Centella transmisión S.A. [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 99.99% |  |
Net cost ownership |  | € 50,000,000 |  |
CHILE | Energy and mobility infrastructures division [Member] | II Centella Transmisión, S.A [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 50.10% |  |
Net cost ownership |  | € 0 |  |
CHILE | Energy and mobility infrastructures division [Member] | Berliam S.p.A. [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 65.10% |  |
Net cost ownership |  | € 0 |  |
CHILE | Energy and mobility infrastructures division [Member] | II Berliam S.p.A. [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 34.90% |  |
Net cost ownership |  | € 0 |  |
CHILE | Energy and mobility infrastructures division [Member] | Steel Ingenieria, S.A. [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 99.99% |  |
Net cost ownership |  | € 31,000,000 |  |
CHILE | Energy and mobility infrastructures division [Member] | Veltis, Sp.a |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
CHILE | Energy and mobility infrastructures division [Member] | Walvis, S.A. |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 99.70% |  |
Net cost ownership |  | € 0 |  |
CHILE | Energy and mobility infrastructures division [Member] | Inversiones (Chile) Holdings Limitada [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 99.99% |  |
Net cost ownership |  | € 3,000,000 |  |
CHILE | Energy and mobility infrastructures division [Member] | Inversiones (Chile) Limitada [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 99.99% |  |
Net cost ownership |  | € 0 |  |
CHILE | Energy and mobility infrastructures division [Member] | III Centella Transmisión , S.A. |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 49.90% |  |
Net cost ownership |  | € 0 |  |
CHILE | Energy and mobility infrastructures division [Member] | Ferrovial Energy PTY LTD |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
CHILE | Energy and mobility infrastructures division [Member] | II BXF Energía Sp. z.o.o. |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 49.00% |  |
Net cost ownership |  | € 7,000,000 |  |
CHILE | Energy and mobility infrastructures division [Member] | Veltis Servicios, SpA |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
COLOMBIA | Construction division [Member] | Ferrovial Construcción Colombia, S.A.S [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
COLOMBIA | Toll roads division [Member] | Concesionaria ruta del cacao sas [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in associate |  | 30.00% |  |
Investments in associates accounted for using equity method |  | € 27,000,000 |  |
Assets |  | 736,000,000 |  |
Liabilities |  | 644,000,000 |  |
Revenue |  | 139,000,000 |  |
Profit (loss) |  | € 22,000,000 |  |
COLOMBIA | Toll roads division [Member] | Cintra Infraestructuras Colombia, S.A.S. (a) [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 23,000,000 |  |
SLOVAKIA | Construction division [Member] | D4R7 construction S.R.O. [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 65.00% |  |
Net cost ownership |  | € 0 |  |
SLOVAKIA | Construction division [Member] | Ferrovial Construction Slovakia S.R.O [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 99.00% |  |
Net cost ownership |  | € (2,000,000) |  |
SLOVAKIA | Construction division [Member] | Budimex slovakias .r.o [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
FRANCE | Construction division [Member] | Ferrovial Construction France, S.A [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 12,000,000 |  |
MEXICO | Construction division [Member] | I Cadagua Ferr. Industrial México [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 75.10% |  |
Net cost ownership |  | € 0 |  |
MEXICO | Construction division [Member] | II Cadagua Ferr. Industrial México [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 24.90% |  |
Net cost ownership |  | € 0 |  |
NEW ZEALAND | Construction division [Member] | Ferrovial Construction (New Zeeland) Limited [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 2,000,000 |  |
PERU | Construction division [Member] | Ferrovial Construcción Perú, S.A.C. [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 99.99% |  |
Net cost ownership |  | € 0 |  |
POLAND |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Revenue |  | € 2,119,000,000 | € 2,160,000,000 | € 1,842,000,000
POLAND | Construction division [Member] | Pphu promos spzoo [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in associate |  | 26.30% |  |
Investments in associates accounted for using equity method |  | € 1,000,000 |  |
Assets |  | 3,000,000 |  |
Liabilities |  | 1,000,000 |  |
Revenue |  | 3,000,000 |  |
Profit (loss) |  | € 0 |  |
POLAND | Construction division [Member] | Ferrovial Holding US Corp [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 3,102,000,000 |  |
POLAND | Construction division [Member] | Mostostal Kraków S.A. [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 3,000,000 |  |
POLAND | Construction division [Member] | FBSerwis Kamieńsk Sp. z o.o. [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 80.00% |  |
Net cost ownership |  | € 0 |  |
POLAND | Construction division [Member] | FBSerwis Wrocław Sp. z o.o. [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
POLAND | Construction division [Member] | FBSerwis Dolny Sląsk Sp. z o.o. [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
POLAND | Construction division [Member] | FBSerwis Karpatia Sp. z o.o. [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
POLAND | Construction division [Member] | Budimex S.A [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 50.10% |  |
Net cost ownership |  | € 83,000,000 |  |
POLAND | Construction division [Member] | FB Serwis S.A. [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 69,000,000 |  |
POLAND | Construction division [Member] | JZE Sp. z o.o. [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
POLAND | Construction division [Member] | Zaklad, Przetworstwa Odpadow Zawisty Sp. z.o.o. |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
POLAND | Construction division [Member] | PPHUH Konstralex Sp. z.o.o. |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
POLAND | Construction division [Member] | IIIII green waste management 1 spz.o.o [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  |  |  |
POLAND | Construction division [Member] | Green Waste Management 6 sp.z.o.o. |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  |  |  |
POLAND | Construction division [Member] | Mostostal Kraków Energetyka sp. z o.o. |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
POLAND | Construction division [Member] | Budimex Budownictwo Sp. z o.o. |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
POLAND | Construction division [Member] | Budimex Kolejnictwo SA |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 26,000,000 |  |
POLAND | Construction division [Member] | Budimex Parking Wrocław Sp. z o.o. |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 51.00% |  |
Net cost ownership |  | € 1,000,000 |  |
POLAND | Construction division [Member] | Fotowoltaika HIG XIV Sp. z o.o. |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 2,000,000 |  |
POLAND | Construction division [Member] | FBSerwis Zielony Kamieńsk Sp. z o.o. |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
POLAND | Construction division [Member] | Cintra Development BV |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
POLAND | Construction division [Member] | Cintra INVIT Investments B.V. |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 718,000,000 |  |
POLAND | Construction division [Member] | Cintra IM Investments B.V. |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
POLAND | Construction division [Member] | Budimex SA Tecnicas Reunidas SA - Turów s.c. |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 50.00% |  |
Net cost ownership |  | € 0 |  |
POLAND | Construction division [Member] | Budimex SA Cadagua SA V sc |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 99.90% |  |
Net cost ownership |  | € 0 |  |
POLAND | Construction division [Member] | Budimex SA Cadagua SA IV sc |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 99.90% |  |
Net cost ownership |  | € 0 |  |
POLAND | Construction division [Member] | Budimex SA Sygnity SA sj |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 67.00% |  |
Net cost ownership |  | € 0 |  |
POLAND | Construction division [Member] | Budimex D Sp. z o.o. |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 76.00% |  |
Net cost ownership |  | € 0 |  |
POLAND | Construction division [Member] | Budimex R Sp. z o.o. |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
POLAND | Construction division [Member] | Budimex P Sp. z o.o. |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
POLAND | Construction division [Member] | Budimex O Sp. z o.o. |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
POLAND | Construction division [Member] | Circular Construction SA |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
POLAND | Construction division [Member] | Budimex Most Wschodni S.A. |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
POLAND | Construction division [Member] | FBSerwis Paliwa Alternatywne Sp. z o.o. [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
POLAND | Construction division [Member] | FBSerwis Odbiór Sp. z o.o. [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
POLAND | Construction division [Member] | FBSerwis B Sp. z o.o. [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
POLAND | Construction division [Member] | FBSerwis A Sp. z o.o. [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
POLAND | Construction division [Member] | FBSerwis Zielona Karpatia Sp. z o.o. |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
POLAND | Construction division [Member] | FBSerwis Zielony Dolny Śląsk Sp. z o.o. |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
POLAND | Construction division [Member] | FBSerwis Zielony Wrocław Sp. z o.o. |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
POLAND | Construction division [Member] | Magnolia Energy Sp. z o.o. |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 9,000,000 |  |
POLAND | Construction division [Member] | Budimex PPP SA |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 4,000,000 |  |
POLAND | Construction division [Member] | Budimex F Sp. z o.o. |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
POLAND | Construction division [Member] | Budimex A Sp. z o.o. |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
PUERTO RICO | Construction division [Member] | Ditecpesa PR, LLC |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 1,000,000 |  |
PUERTO RICO | Construction division [Member] | Ferrovial Construcción Puerto Rico, LLC |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 25,000,000 |  |
INDIA | Toll roads division [Member] | IRB infrastructure developers limited [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in associate |  | 19.90% |  |
Investments in associates accounted for using equity method |  | € 315,000,000 |  |
Assets |  | 5,025,000,000 |  |
Liabilities |  | 3,463,000,000 |  |
Revenue |  | 894,000,000 |  |
Profit (loss) |  | € 50,000,000 |  |
INDIA | Toll roads division [Member] | I IRB Infrastructure Trust |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in associate |  | 51.00% |  |
Investments in associates accounted for using equity method |  | € 704,000,000 |  |
Assets |  | 4,800,000,000 |  |
Liabilities |  | 3,107,000,000 |  |
Revenue |  | 243,000,000 |  |
Profit (loss) |  | € (24,000,000) |  |
INDIA | Toll roads division [Member] | II IRB Infrastructure Trust |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in associate |  | 24.00% |  |
Investments in associates accounted for using equity method |  | € 0 |  |
Assets |  | 0 |  |
Liabilities |  | 0 |  |
Revenue |  | 0 |  |
Profit (loss) |  | € 0 |  |
INDIA | Toll roads division [Member] | I MMK Toll Road Private Limited |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in associate |  | 51.00% |  |
Investments in associates accounted for using equity method |  | € 0 |  |
Assets |  | 1,000,000 |  |
Liabilities |  | 0 |  |
Revenue |  | 0 |  |
Profit (loss) |  | € 0 |  |
INDIA | Toll roads division [Member] | II MMK Toll Road Private Limited |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in associate |  | 24.00% |  |
Investments in associates accounted for using equity method |  | € 0 |  |
Assets |  | 0 |  |
Liabilities |  | 0 |  |
Revenue |  | 0 |  |
Profit (loss) |  | € 0 |  |
INDIA | Toll roads division [Member] | Cinfra India Private Limited |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 99.99% |  |
Net cost ownership |  | € 0 |  |
PORTUGAL | Toll roads division [Member] | Vialivre, S.A. [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 84.00% |  |
Net cost ownership |  | € 0 |  |
TURKIYE | Airports division [Member] | YDA HAVALIMANI YATIRIM VE (Dalaman) |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 60.00% |  |
Net cost ownership |  | € 145,000,000 |  |
QATAR | Airports division [Member] | FMM Company LLC [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in associate |  | 49.00% |  |
Investments in associates accounted for using equity method |  | € 18,000,000 |  |
Assets |  | 78,000,000 |  |
Liabilities |  | 38,000,000 |  |
Revenue |  | 109,000,000 |  |
Profit (loss) |  | € 14,000,000 |  |
NETHERLANDS | Corporation division [Member] | Ferrovial Netherlands B.V. [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 80,000,000 |  |
NETHERLANDS | Corporation division [Member] | Ferrovial Ventures Netherlands B.V. |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 9,000,000 |  |
NETHERLANDS | Construction division [Member] | Ferrovial Construction International SE [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 761,000,000 |  |
NETHERLANDS | Toll roads division [Member] | Cintra Infrastructures SE [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 3,021,000,000 |  |
NETHERLANDS | Toll roads division [Member] | Cintra Global SE [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 3,242,000,000 |  |
NETHERLANDS | Toll roads division [Member] | 407 Toronto Highway B.V. [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 2,664,000,000 |  |
NETHERLANDS | Toll roads division [Member] | Cintra INR Investments B.V. [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 369,000,000 |  |
NETHERLANDS | Toll roads division [Member] | Cintra Projects B.V |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
NETHERLANDS | Airports division [Member] | Hubco Netherlands B.V. [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 807,000,000 |  |
NETHERLANDS | Airports division [Member] | FERROVIAL AIRPORTS FMM BV [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 5,000,000 |  |
NETHERLANDS | Airports division [Member] | Ferrovial Airports Turkey B.V. [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 152,000,000 |  |
NETHERLANDS | Energy and mobility infrastructures division [Member] | Ferrovial Services International, SE |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 76,000,000 |  |
NETHERLANDS | Energy and mobility infrastructures division [Member] | Ferrovial Transco International B.V. |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 89,000,000 |  |
IRELAND | Corporation division [Member] | Landmille, Ltd [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 1,000,000 |  |
IRELAND | Construction division [Member] | Ferrovial Construction Ireland Ltd [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 8,000,000 |  |
GERMANY | Construction division [Member] | Budimex Bau GmbH [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 0 |  |
GERMANY | Construction division [Member] | RailBX GmbH |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 6,000,000 |  |
LUXEMBOURG | Corporation division [Member] | Krypton RE, S.A. [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Net cost ownership |  | € 8,000,000 |  |

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