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Other provisions, contingent liabilities and contingent assets- Narrative (Details) £ in Millions | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2024 GBP (£) year | Dec. 31, 2024 EUR (€) | Dec. 31, 2023 EUR (€) | Dec. 31, 2022 EUR (€) | Dec. 31, 2021 EUR (€) | Dec. 31, 2019 EUR (€) year | Dec. 31, 2016 | Jan. 17, 2025 EUR (€) | Dec. 31, 2024 EUR (€) year | Dec. 31, 2023 GBP (£) | Dec. 31, 2023 EUR (€) | Feb. 11, 2021 year
Detail of information about contingent liabilities assets and commitments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Balance sheet for a total amount |  | € 84,000,000 | € 85,000,000 | € 200,000,000 |  |  |  |  |  |  |  |
Ongoing litigation arising from tax assessments carried out following tax audits in Spain for a disputed sum of EUR |  | 200,000,000 | 207,000,000 | 332,000,000 |  |  |  |  |  |  |  |
Maximum amount payable in connection with a potential unfavorable result |  | 42,000,000.0 |  |  |  |  |  |  |  |  |  |
Refund of the amounts initially claimed and paid |  | 45,500,000 |  |  |  |  |  |  |  |  |  |
Amended corporate income taxation by limiting the offsetting of net operating losse |  | 0.25 |  |  |  |  |  |  |  |  |  |
Additional positive impact due to the resolution of the ruling related to Royal Decree-Law 3/2016 (RDL 3/2016) for years after 2023 |  |  |  |  |  |  |  |  | € 0.70 |  |  |
Expected amount to be recovered by the Group in relation to the years 2016 to 2023 due to the resolution of the ruling related to Royal Decree-Law 3/2016 (RDL 3/2016) |  |  |  |  |  |  |  |  | 30,600,000 |  |  |
Guarantees that secure commitments to investIn the capital of infrastructure project companies |  |  |  |  |  |  |  |  | € 359,000,000 |  |  |
Number of types of guarantes given by exinfrastructure project companies to infrastructure project companies | year | 2 |  |  |  |  |  |  |  | 2 |  |  |
Guarantees related to the divestment of the old services provided |  |  |  |  |  |  |  |  | € 19,000,000 |  |  |
Fine for litigation related to the sanctioning procedure opened by the National Commission of Markets and Competition (CNMC) in relation to the road maintenance sector |  |  |  |  | € 5,700,000 |  |  |  |  |  |  |
Guarantees granted to the buyer related to the litigation opened by the spanish national markets and competition commission CNMC provisioned |  |  |  |  |  |  |  |  | 6,000,000 |  |  |
Amount of the guarantees provisioned |  |  |  | 4,400,000 |  |  |  |  |  |  |  |
Capital commitments |  |  |  |  |  |  |  |  | 427,000,000 |  | € 850,000,000 |
Capital commitments terminal one at new yorks JFK airport |  | 329,000,000 | 768,000,000 |  |  |  |  |  |  |  |  |
If the final judgment is unfavorable to the Group there will be an adverse effect |  | 87,600,000 |  |  |  |  |  |  |  |  |  |
Provisions | £ 22 |  |  |  |  |  |  |  | € 1,311,000,000 | £ 40 | 1,279,000,000 |
Overhead costs of the business estimated per annum | £ | 8 |  |  |  |  |  |  |  |  |  |  |
Guarantees given by various group companies in relation with waste treatment and generation of energy by group | £ | £ 295 |  |  |  |  |  |  |  |  |  |  |
Number of waste treatment plants that are already operational | year | 4 |  |  |  |  |  |  |  | 4 |  |  |
Tons of protected land located in Blatná na Ostrove by extraction |  | 200,000 |  |  |  |  |  |  |  |  |  |
Non-controlling interests |  |  |  | € 2,240,000,000 |  |  |  |  | € 2,045,000,000 |  | 2,113,000,000 |
Financial closing |  | 285,000,000 |  |  |  |  |  |  |  |  |  |
Equity accounted infrastructure projects companies [Member] |  |  |  |  |  |  |  |  |  |  |  |
Detail of information about contingent liabilities assets and commitments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Capital commitments |  |  |  |  |  |  |  |  | 376,000,000 |  |  |
Toll roads division [Member] | Equity accounted infrastructure projects companies [Member] |  |  |  |  |  |  |  |  |  |  |  |
Detail of information about contingent liabilities assets and commitments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Capital commitments |  |  |  |  |  |  |  |  | 46,000,000 |  |  |
Construction division [Member] |  |  |  |  |  |  |  |  |  |  |  |
Detail of information about contingent liabilities assets and commitments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Gurantees amount |  |  |  |  |  |  |  |  | 1,575,000,000 |  |  |
Construction division [Member] | Equity accounted infrastructure projects companies [Member] |  |  |  |  |  |  |  |  |  |  |  |
Detail of information about contingent liabilities assets and commitments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Capital commitments |  |  |  |  |  |  |  |  | 1,000,000 |  |  |
Airports division [Member] | Equity accounted infrastructure projects companies [Member] |  |  |  |  |  |  |  |  |  |  |  |
Detail of information about contingent liabilities assets and commitments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Capital commitments |  |  |  |  |  |  |  |  | 329,000,000 |  |  |
Energy and mobility infrastructure division [Member] |  |  |  |  |  |  |  |  |  |  |  |
Detail of information about contingent liabilities assets and commitments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Non-controlling interests |  |  |  |  |  |  |  |  | 35,000,000 |  |  |
POLAND | Mitsubishi Power Europe GmbH [Member] |  |  |  |  |  |  |  |  |  |  |  |
Detail of information about contingent liabilities assets and commitments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Consortium led by Power unit in Turrow |  |  |  |  |  |  |  | 52.84% |  |  |  |
POLAND | Tecnicas Reunidas S.A. [Member] |  |  |  |  |  |  |  |  |  |  |  |
Detail of information about contingent liabilities assets and commitments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Consortium led by Power unit in Turrow |  |  |  |  |  |  |  | 23.58% |  |  |  |
POLAND | Budimex S.A [Member] |  |  |  |  |  |  |  |  |  |  |  |
Detail of information about contingent liabilities assets and commitments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Claim for liquidated damages and others |  |  |  |  |  |  |  | € 248,200,000 |  |  |  |
Consortium led by Power unit in Turrow |  |  |  |  |  |  |  | 23.58% |  |  |  |
POLAND | Construction division [Member] |  |  |  |  |  |  |  |  |  |  |  |
Detail of information about contingent liabilities assets and commitments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Provisions |  |  |  |  |  |  |  |  | (17,000,000) |  |  |
UNITED STATES |  |  |  |  |  |  |  |  |  |  |  |
Detail of information about contingent liabilities assets and commitments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Provisions |  |  |  |  |  |  |  |  | 8,000,000 |  | 26,000,000 |
Anillo Vial Periférico Project [Member] |  |  |  |  |  |  |  |  |  |  |  |
Detail of information about contingent liabilities assets and commitments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Contractual amount outstanding on financial assets that were derecognized during the reporting period and are still subject to implementation activities. |  | € 205,000,000 |  |  |  |  |  |  |  |  |  |
Ferrovial construction companies in the united states [Member] |  |  |  |  |  |  |  |  |  |  |  |
Detail of information about contingent liabilities assets and commitments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Gurantees amount |  |  |  |  |  |  |  |  |  |  | 1,757,000,000 |
Ferrovial construction companies in the united states [Member] | UNITED STATES |  |  |  |  |  |  |  |  |  |  |  |
Detail of information about contingent liabilities assets and commitments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Gurantees amount |  |  |  |  |  |  |  |  | 1,235,000,000 |  |  |
Budimex group [Member] |  |  |  |  |  |  |  |  |  |  |  |
Detail of information about contingent liabilities assets and commitments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Gurantees amount |  |  |  |  |  |  |  |  | 158,000,000 |  |  |
Other construction companies [Member] |  |  |  |  |  |  |  |  |  |  |  |
Detail of information about contingent liabilities assets and commitments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Gurantees amount |  |  |  |  |  |  |  |  | 180,000,000 |  |  |
Other construction companies [Member] | UNITED KINGDOM |  |  |  |  |  |  |  |  |  |  |  |
Detail of information about contingent liabilities assets and commitments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Gurantees amount |  |  |  |  |  |  |  |  | 119,000,000 |  |  |
Other construction companies [Member] | SPAIN |  |  |  |  |  |  |  |  |  |  |  |
Detail of information about contingent liabilities assets and commitments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Gurantees amount |  |  |  |  |  |  |  |  | 22,000,000 |  |  |
Bank guarantees [Member] |  |  |  |  |  |  |  |  |  |  |  |
Detail of information about contingent liabilities assets and commitments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Gurantees amount |  |  |  |  |  |  |  |  | 2,888,000,000 |  |  |
Bonding agencies guarantees [Member] |  |  |  |  |  |  |  |  |  |  |  |
Detail of information about contingent liabilities assets and commitments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Gurantees amount |  |  |  |  |  |  |  |  | 4,666,000,000 |  |  |
Insurance companies guarantees [Member] |  |  |  |  |  |  |  |  |  |  |  |
Detail of information about contingent liabilities assets and commitments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Gurantees amount |  |  |  |  |  |  |  |  | 706,000,000 |  |  |
Litigation and taxes [Member] | Toll roads division [Member] |  |  |  |  |  |  |  |  |  |  |  |
Detail of information about contingent liabilities assets and commitments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Proportion of ownership interest of Allan Myers VA in FAM construction, LLC |  |  |  |  |  |  | 30.00% |  |  |  |  |
Number of death people as result of the multiple accident on the 35w managed lanes toll road in dallas texas | year |  |  |  |  |  |  |  |  |  |  |  | 6
Proportion of ownership interest in subsidiary |  |  |  | 53.66% |  |  |  |  |  |  |  |
Number of vehicles involved in a multiple accident on the 35W managed lanes toll road | year |  |  |  |  |  |  |  |  |  |  |  | 133
Number of claims resulting from the multiple accident on the 35W Managed Lanes tollway | year |  |  |  |  |  |  |  |  |  |  |  | 29
Amount of the civil lawsuit against cintra infrastructure SEB y JGomez parent |  |  |  |  |  |  |  |  | 10,000,000 |  |  |
Proportion of ownership interest of Ferrovial in FAM construction, LLC |  |  |  |  |  |  | 70.00% |  |  |  |  |
Litigation and taxes [Member] | Construction division [Member] |  |  |  |  |  |  |  |  |  |  |  |
Detail of information about contingent liabilities assets and commitments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Provisions |  |  |  |  |  |  |  |  | 90,000,000 |  | 68,000,000 |
FineId imposed by CNMC by Ferrovial Construction S.A. |  |  | € 38,500,000 |  |  |  |  |  |  |  |  |
Environmental damage caused by D4R7 Construction S.R.O |  |  |  |  |  | € 8,700,000 |  |  |  |  |  |
Proportion of ownership interest of Ferrovial in consorcio Ferrocol Santander | 70.00% | 70.00% |  |  |  |  |  |  |  |  |  |
Litigation and taxes [Member] | Construction division [Member] | D4R7 construction S.R.O. [Member] |  |  |  |  |  |  |  |  |  |  |  |
Detail of information about contingent liabilities assets and commitments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Proportion of ownership interest in subsidiary |  |  |  |  |  | 65.00% |  |  |  |  |  |
Proportion of ownership interest in D4R7 construction S.R.O. |  |  |  |  |  | 35.00% |  |  |  |  |  |
Number of plots of land jánošíková as loans for the construction of the D4R7 toll road | year |  |  |  |  |  | 2 |  |  |  |  |  |
Environmental damage caused by D4R7 Construction S.R.O |  | € 6,600,000 |  |  |  |  |  |  |  |  |  |
Bank guarantees and other guarantees issued by insurance companies [Member] |  |  |  |  |  |  |  |  |  |  |  |
Detail of information about contingent liabilities assets and commitments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Gurantees amount |  |  |  |  |  |  |  |  | 8,260,000,000 |  | 8,533,000,000 |
Bank guarantees and other guarantees issued by insurance companies [Member] | Toll roads division [Member] |  |  |  |  |  |  |  |  |  |  |  |
Detail of information about contingent liabilities assets and commitments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Gurantees amount |  |  |  |  |  |  |  |  | 476,000,000 |  | 404,000,000 |
Bank guarantees and other guarantees issued by insurance companies [Member] | Construction division [Member] |  |  |  |  |  |  |  |  |  |  |  |
Detail of information about contingent liabilities assets and commitments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Gurantees amount |  |  |  |  |  |  |  |  | 7,074,000,000 |  | 7,013,000,000 |
Bank guarantees and other guarantees issued by insurance companies [Member] | Airports division [Member] |  |  |  |  |  |  |  |  |  |  |  |
Detail of information about contingent liabilities assets and commitments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Gurantees amount |  |  |  |  |  |  |  |  | € 355,000,000 |  | € 799,000,000 |

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