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Parent Company Changes In Equity (Details) - EUR (€) € in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Condensed changes in equity statements caption [Line Items] |  |  |
Merger impact |  | € 0 |
Scrip dividend | € (130) | (136) | € (132)
Increase (decrease) in treasury share repurchase in equity | (701) | (114) | (446)
Increase (decrease) through share-based payment transactions, equity | 13 | 12 | 0
Other treasury repurchase in equity instruments | 272 | 0 | 0
Increase (decrease) through other changes, equity | 12 | 17 | 46
Share premium [member] |  |  |
Condensed changes in equity statements caption [Line Items] |  |  |
Merger impact |  | 4,426 |
Scrip dividend | 0 | (58) | 0
Increase (decrease) in treasury share repurchase in equity | 0 | (52) | (218)
Increase (decrease) through share-based payment transactions, equity | 0 | 0 | 0
Other treasury repurchase in equity instruments | 0 | 0 | 0
Increase (decrease) through other changes, equity | 0 | 0 | 0
Treasury shares [member] |  |  |
Condensed changes in equity statements caption [Line Items] |  |  |
Merger impact |  | 0 |
Scrip dividend | 0 | 0 | 0
Increase (decrease) in treasury share repurchase in equity | 0 | (52) | 98
Increase (decrease) through share-based payment transactions, equity | 0 | 0 | 0
Other treasury repurchase in equity instruments | 0 | 0 | 0
Increase (decrease) through other changes, equity | 0 | 0 | 0
Reserves [Member] |  |  |
Condensed changes in equity statements caption [Line Items] |  |  |
Merger impact |  | (4,288) |
Scrip dividend | (130) | (78) | (135)
Increase (decrease) in treasury share repurchase in equity | (701) | (10) | (321)
Increase (decrease) through share-based payment transactions, equity | 13 | 12 | 0
Other treasury repurchase in equity instruments | 272 | 0 | 0
Increase (decrease) through other changes, equity | 17 | 15 | 41
Ferrovial SE as parent company [Member] |  |  |
Condensed changes in equity statements caption [Line Items] |  |  |
Balance on the statements of change equity for parent company period start | 4,102 | 4,576 | 4,538
Merger impact |  | 0 |
Profit loss in Ferrovial SE of changes in equity for parent company | 3,270 | 308 | 318
Other comprehensive income and expense recognised directly in equity, net of tax for parent company | 153 | (65) | 317
Total other comprehensive transfer to income in equity for parent company | (15) | (3) | 131
Total other income and expense recognized in equity for the year for the parent company | 3,408 | 240 | 766
Scrip dividend | 130 | 136 | 132
Increase (decrease) in treasury share repurchase in equity | (701) | (114) | (446)
Aggregated shareholder remuneration in equity for parent company | (831) | (250) | (578)
Increase (decrease) through share-based payment transactions, equity | 13 | 12 | 0
Other treasury repurchase in equity instruments | (272) |  |
Increase (decrease) through other changes, equity | 2 | (476) | (150)
Other transactions aggregated to balance in equity for parent company | (257) | (464) | (150)
Balance on the statements of change equity for parent company period end | 6,422 | 4,102 | 4,576
Ferrovial SE as parent company [Member] | Share capital [Member] |  |  |
Condensed changes in equity statements caption [Line Items] |  |  |
Balance on the statements of change equity for parent company period start | 7 | 145 | 147
Merger impact |  | (138) |
Profit loss in Ferrovial SE of changes in equity for parent company | 0 | 0 | 0
Other comprehensive income and expense recognised directly in equity, net of tax for parent company | 0 | 0 | 0
Total other comprehensive transfer to income in equity for parent company | 0 | 0 | 0
Total other income and expense recognized in equity for the year for the parent company | 0 | 0 | 0
Scrip dividend | 0 | 0 | (3)
Increase (decrease) in treasury share repurchase in equity | 0 | 0 | (5)
Aggregated shareholder remuneration in equity for parent company | 0 | 0 | (2)
Increase (decrease) through share-based payment transactions, equity | 0 | 0 | 0
Other treasury repurchase in equity instruments |  |  |
Increase (decrease) through other changes, equity | 0 | 0 | 0
Other transactions aggregated to balance in equity for parent company | 0 | 0 | 0
Balance on the statements of change equity for parent company period end | 7 | 7 | 145
Ferrovial SE as parent company [Member] | Share premium [member] |  |  |
Condensed changes in equity statements caption [Line Items] |  |  |
Balance on the statements of change equity for parent company period start | 4,316 | 0 | 218
Merger impact |  | 4,426 |
Profit loss in Ferrovial SE of changes in equity for parent company | 0 | 0 | 0
Other comprehensive income and expense recognised directly in equity, net of tax for parent company | 0 | 0 | 0
Total other comprehensive transfer to income in equity for parent company | 0 | 0 | 0
Total other income and expense recognized in equity for the year for the parent company | 0 | 0 | 0
Scrip dividend | 0 | 58 | 0
Increase (decrease) in treasury share repurchase in equity | 0 | (52) | (218)
Aggregated shareholder remuneration in equity for parent company | 0 | (110) | (218)
Increase (decrease) through share-based payment transactions, equity | 0 | 0 | 0
Other treasury repurchase in equity instruments |  |  |
Increase (decrease) through other changes, equity | 0 | 0 | 0
Other transactions aggregated to balance in equity for parent company | 0 | 0 | 0
Balance on the statements of change equity for parent company period end | 4,316 | 4,316 | 0
Ferrovial SE as parent company [Member] | Treasury shares [member] |  |  |
Condensed changes in equity statements caption [Line Items] |  |  |
Balance on the statements of change equity for parent company period start | (78) | (26) | (124)
Merger impact |  | 0 |
Profit loss in Ferrovial SE of changes in equity for parent company | 0 | 0 | 0
Other comprehensive income and expense recognised directly in equity, net of tax for parent company | 0 | 0 | 0
Total other comprehensive transfer to income in equity for parent company | 0 | 0 | 0
Total other income and expense recognized in equity for the year for the parent company | 0 | 0 | 0
Scrip dividend | 0 | 0 | 0
Increase (decrease) in treasury share repurchase in equity | 0 | (52) | 98
Aggregated shareholder remuneration in equity for parent company | 0 | (52) | 98
Increase (decrease) through share-based payment transactions, equity | 0 | 0 | 0
Other treasury repurchase in equity instruments |  |  |
Increase (decrease) through other changes, equity | 0 | 0 | 0
Other transactions aggregated to balance in equity for parent company | 0 | 0 | 0
Balance on the statements of change equity for parent company period end | (78) | (78) | (26)
Ferrovial SE as parent company [Member] | Reserves [Member] |  |  |
Condensed changes in equity statements caption [Line Items] |  |  |
Balance on the statements of change equity for parent company period start | (143) | 4,457 | 4,297
Merger impact |  | (4,288) |
Profit loss in Ferrovial SE of changes in equity for parent company | 3,270 | 308 | 318
Other comprehensive income and expense recognised directly in equity, net of tax for parent company | 153 | (65) | 317
Total other comprehensive transfer to income in equity for parent company | (15) | (3) | 131
Total other income and expense recognized in equity for the year for the parent company | 3,408 | 240 | 766
Scrip dividend | 130 | 78 | 135
Increase (decrease) in treasury share repurchase in equity | (701) | (10) | (321)
Aggregated shareholder remuneration in equity for parent company | (831) | (88) | (456)
Increase (decrease) through share-based payment transactions, equity | 13 | 12 | 0
Other treasury repurchase in equity instruments | (272) |  |
Increase (decrease) through other changes, equity | 2 | (476) | (150)
Other transactions aggregated to balance in equity for parent company | (257) | (464) | (150)
Balance on the statements of change equity for parent company period end | € 2,177 | € (143) | € 4,457

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