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Segment Reporting - Narrative (Details)	12 Months Ended
	Dec. 31, 2024 year
Disclosure of operating segments [abstract]
Number of ferrovial reportable segments	4
Percentage of construction and toll roads revenue over total of group consolidated revenue	10.00%

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- Definition

Number of ferrovial reportable segments

+ References

No definition available.

+ Details

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Namespace Prefix:	fer_
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- Definition

Percentage of construction and toll roads revenue over total of group consolidated revenue

+ References

No definition available.

+ Details

Name:	fer_PercentageOfConstructionAndTollRoadsRevenueOverTotalOfGroupConsolidatedRevenue
Namespace Prefix:	fer_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

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- References

No definition available.

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration