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Basis Of Presentation And Consolidation Scope - Narrative (Details) - EUR (€) € in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Detail of information about of basis of presentation and consolidation scope [Line Items] |  |  |
Ownership interest of the Ferrovial | € 2,023 |  |
Financial assets at value of changes in results | 574 | € 11 | € 47
Airports division [Member] |  |  |
Detail of information about of basis of presentation and consolidation scope [Line Items] |  |  |
Financial assets at value of changes in results | € 547 |  |
FGP Topco limited [Member] |  |  |
Detail of information about of basis of presentation and consolidation scope [Line Items] |  |  |
Percentage of the sale of the FGP Topco | 19.75% |  |
FGP Topco limited [Member] | Financial investment carried at fair value [Member] |  |  |
Detail of information about of basis of presentation and consolidation scope [Line Items] |  |  |
Percentage of the sale of the FGP Topco | 19.75% |  |
Percentage ownership interest of the Ferrovial | 5.25% |  |
FGP Topco limited [Member] | Airports division [Member] |  |  |
Detail of information about of basis of presentation and consolidation scope [Line Items] |  |  |
Percentage of the sale of the FGP Topco | 19.75% |  |
IRB Infrastructure Trust (Private InvIT) [Member] | Toll roads division [Member] |  |  |
Detail of information about of basis of presentation and consolidation scope [Line Items] |  |  |
Percentage adquired by Ferrovial subsidiary of the buyers capital | 23.99% |  |

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