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Investment in associates balance sheet movements (Details) ₨ in Millions, $ in Millions, $ in Millions | 1 Months Ended | 6 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Sep. 30, 2024 EUR (€) | Dec. 31, 2024 EUR (€) | Dec. 31, 2024 INR (₨) | Dec. 31, 2024 EUR (€) | Dec. 31, 2024 CAD ($) | Dec. 31, 2024 INR (₨) | Dec. 31, 2023 EUR (€) | Dec. 31, 2023 INR (₨) | Dec. 31, 2022 EUR (€) | Dec. 31, 2024 USD ($) | Dec. 31, 2024 INR (₨) | Sep. 30, 2024 CAD ($) | Dec. 31, 2023 CAD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2023 INR (₨) | Dec. 31, 2021 EUR (€)
Balance sheet movements of associates companies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Non-current assets | € |  | € 21,327,000,000 |  | € 21,327,000,000 |  |  | € 19,328,000,000 |  |  |  |  |  |  |  |  |
Other intangible assets | € |  | 128,000,000 |  | 128,000,000 |  |  | 122,000,000 |  |  |  |  |  |  |  |  |
Current assets | € |  | 7,672,000,000 |  | 7,672,000,000 |  |  | 6,990,000,000 |  |  |  |  |  |  |  |  |
Non-current derivative financial assets | € |  | 221,000,000 |  | 221,000,000 |  |  | 254,000,000 |  |  |  |  |  |  |  |  |
Other non current financial assets other than derivatives and infrastructure projects | € | € 1,139,000,000 | 1,139,000,000 |  | 1,139,000,000 |  |  | 1,148,000,000 |  | € 1,095,000,000 |  |  |  |  |  |  |
Deferred tax assets | € |  | 1,159,000,000 |  | 1,159,000,000 |  |  | 1,006,000,000 |  |  |  |  |  |  |  |  |
Other current financial assets | € |  | 0 |  | 0 |  |  | 0 |  |  |  |  |  |  |  |  |
Current tax assets, current | € |  | 48,000,000 |  | 48,000,000 |  |  | 35,000,000 |  |  |  |  |  |  |  |  |
Assets | € |  | 28,999,000,000 |  | 28,999,000,000 |  |  | 26,318,000,000 |  |  |  |  |  |  |  |  |
Cash and cash equivalents | € |  | 4,828,000,000 |  | 4,828,000,000 |  |  | 4,789,000,000 |  | 5,130,000,000 |  |  |  |  |  |  | € 5,536,000,000
Equity | € |  | (8,120,000,000) |  | (8,120,000,000) |  |  | (5,879,000,000) |  | (6,473,000,000) |  |  |  |  |  |  | € (5,946,000,000)
Non-current liabilities | € |  | 14,578,000,000 |  | 14,578,000,000 |  |  | 14,664,000,000 |  |  |  |  |  |  |  |  |
Deferred tax liabilities | € |  | 1,239,000,000 |  | 1,239,000,000 |  |  | 1,086,000,000 |  |  |  |  |  |  |  |  |
Current liabilities | € |  | 6,301,000,000 |  | 6,301,000,000 |  |  | 5,775,000,000 |  |  |  |  |  |  |  |  |
Liabilities | € |  | 20,879,000,000 |  | 20,879,000,000 |  |  | 20,439,000,000 |  |  |  |  |  |  |  |  |
Equity and liabilities | € |  | 28,999,000,000 |  | 28,999,000,000 |  |  | 26,318,000,000 |  |  |  |  |  |  |  |  |
Investments in infrastructure projects subtotal | € |  | 14,147,000,000 |  | 14,147,000,000 |  |  | 13,495,000,000 |  | 13,667,000,000 |  |  |  |  |  |  |
Trade and other current receivables | € |  | 2,228,000,000 |  | 2,228,000,000 |  |  | 1,677,000,000 |  | 1,600,000,000 |  |  |  |  |  |  |
Current borrowings and current portion of non-current borrowings | € |  | 1,196,000,000 |  | 1,196,000,000 |  |  | 942,000,000 |  |  |  |  |  |  |  |  |
Trade and other current payables | € |  | 3,902,000,000 |  | 3,902,000,000 |  |  | 3,646,000,000 |  | 3,429,000,000 |  |  |  |  |  |  |
Profit (loss) from continuing operations | € |  |  |  | 3,476,000,000 |  |  | 495,000,000 |  | 241,000,000 |  |  |  |  |  |  |
Comprehensive income | € |  |  |  | 3,743,000,000 |  |  | 400,000,000 |  | 892,000,000 |  |  |  |  |  |  |
Revenue | € | € 9,147,000,000 |  |  | 9,147,000,000 |  |  | 8,514,000,000 |  | € 7,551,000,000 |  |  |  |  |  |  |
IRB Infrastructure Trust (Private InvIT) [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance sheet movements of associates companies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Group´s share in equity (23.99% Million EUR) | € |  | 646,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ganga Acquisition | € |  |  |  | 58,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Group´s share in equity including Ganga acquisition (23.99%) | € |  |  |  | 704,000,000 |  |  |  |  |  |  |  |  |  |  |  |
IRB Infrastructure Trust (Private InvIT) [Member] | Fair value recognised on acquisition June [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance sheet movements of associates companies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Group´s share in equity (23.99% Million EUR) | € |  |  |  | 652,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Ganga Acquisition | € |  |  |  | 0 |  |  |  |  |  |  |  |  |  |  |  |
Group´s share in equity including Ganga acquisition (23.99%) | € |  |  |  | 652,000,000 |  |  |  |  |  |  |  |  |  |  |  |
IRB infrastructure developers limited [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance sheet movements of associates companies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Group´s share in equity (19.86% and 24.86% post and pre-sale, respectively) | € |  | 28,141,000,000 |  | 28,141,000,000 |  |  | 34,611,000,000 |  |  |  |  |  |  |  |  |
Group´s share in equity (Million EUR) | € |  | 315,000,000 |  | 315,000,000 |  |  | 376,000,000 |  |  |  |  |  |  |  |  |
United States of America, Dollars |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance sheet movements of associates companies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets | € |  | 15,561,000,000 |  | 15,561,000,000 |  |  | 13,399,000,000 |  |  |  |  |  |  |  |  |
Liabilities | € |  | 13,131,000,000 |  | 13,131,000,000 |  |  | 11,294,000,000 |  |  |  |  |  |  |  |  |
United States of America, Dollars | JFKNTO sponsor aggregator LLC [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance sheet movements of associates companies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Non-current assets |  |  |  |  |  |  |  |  |  | $ 8,330 |  |  |  | $ 6,482 |  |
Other intangible assets |  |  |  |  |  |  |  |  |  | 8,067 |  |  |  | 6,168 |  |
Current assets |  |  |  |  |  |  |  |  |  | 2,510 |  |  |  | 322 |  |
Non-current derivative financial assets |  |  |  |  |  |  |  |  |  | 83 |  |  |  | 182 |  |
Other non current financial assets other than derivatives and infrastructure projects |  |  |  |  |  |  |  |  |  | 180 |  |  |  | 132 |  |
Other current financial assets |  |  |  |  |  |  |  |  |  | 1,984 |  |  |  | 0 |  |
Assets |  |  |  |  |  |  |  |  |  | 10,840 |  |  |  | 6,804 |  |
Cash and cash equivalents |  |  |  |  |  |  |  |  |  | 251 |  |  |  | 148 |  |
Equity |  |  |  |  |  |  |  |  |  | (1,994) |  |  |  | (932) |  |
Non-current liabilities |  |  |  |  |  |  |  |  |  | 8,504 |  |  |  | 5,559 |  |
Other non-current liabilities |  |  |  |  |  |  |  |  |  | 3,850 |  |  |  | 3,785 |  |
Current liabilities |  |  |  |  |  |  |  |  |  | 342 |  |  |  | 313 |  |
Equity and liabilities |  |  |  |  |  |  |  |  |  | 10,840 |  |  |  | 6,804 |  |
Issued capital |  |  |  |  |  |  |  |  |  | 1,635 |  |  |  | 600 |  |
Share of profit/(loss) |  |  |  |  |  |  |  |  |  | 40 |  |  |  | 11 |  |
Hedging instrument liabilities |  |  |  |  |  |  |  |  |  | 319 |  |  |  | 321 |  |
Debtors and other short-term accounts receivable |  |  |  |  |  |  |  |  |  | 275 |  |  |  | 174 |  |
Bonds and debts - infrastructure projects |  |  |  |  |  |  |  |  |  | 4,654 |  |  |  | 1,774 |  |
Creditors and other short-term accounts payables |  |  |  |  |  |  |  |  |  | $ 342 |  |  |  | $ 313 |  |
Canada, Dollars |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance sheet movements of associates companies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets | € |  | 882,000,000 |  | 882,000,000 |  |  | 976,000,000 |  |  |  |  |  |  |  |  |
Liabilities | € |  | 457,000,000 |  | 457,000,000 |  |  | 469,000,000 |  |  |  |  |  |  |  |  |
Canada, Dollars | 407 International Inc [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance sheet movements of associates companies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Non-current assets |  |  |  |  |  |  |  |  |  |  |  | $ 4,594 | $ 4,584 |  |  |
Current assets |  |  |  |  |  |  |  |  |  |  |  | 1,163 | 1,014 |  |  |
Other non current financial assets other than derivatives and infrastructure projects |  |  |  |  |  |  |  |  |  |  |  | 611 | 568 |  |  |
Deferred tax assets |  |  |  |  |  |  |  |  |  |  |  | 62 | 62 |  |  |
Assets |  |  |  |  |  |  |  |  |  |  |  | 5,757 | 5,598 |  |  |
Cash and cash equivalents |  |  |  |  |  |  |  |  |  |  |  | 720 | 691 |  |  |
Equity |  |  |  |  |  |  |  |  |  |  |  | 6,199 | 5,791 |  |  |
Non-current liabilities |  |  |  |  |  |  |  |  |  |  |  | 11,309 | 10,908 |  |  |
Deferred tax liabilities |  |  |  |  |  |  |  |  |  |  |  | 593 | 590 |  |  |
Current liabilities |  |  |  |  |  |  |  |  |  |  |  | 647 | 481 |  |  |
Equity and liabilities |  |  |  |  |  |  |  |  |  |  |  | 5,757 | 5,598 |  |  |
Increase decrease in current liabilities |  |  |  |  | $ 166 |  |  |  |  |  |  |  |  |  |  |
Increase decrease in non current assets |  |  |  |  | 10 |  |  |  |  |  |  |  |  |  |  |
Investments in infrastructure projects subtotal |  |  |  |  |  |  |  |  |  |  |  | 3,921 | 3,954 |  |  |
Increase decrease in fixed assets in infrastructure projects |  |  |  |  | (33) |  |  |  |  |  |  |  |  |  |  |
Increase decrease in noncurrent financial assets |  |  |  |  | 43 |  |  |  |  |  |  |  |  |  |  |
Increase decrease in deferred tax assets |  |  |  |  | 0 |  |  |  |  |  |  |  |  |  |  |
Increase decrease in current assets |  |  |  |  | 149 |  |  |  |  |  |  |  |  |  |  |
Trade and other current receivables |  |  |  |  |  |  |  |  |  |  |  | 443 | 322 |  |  |
Increase decrease in trade and other current receivables |  |  |  |  | 121 |  |  |  |  |  |  |  |  |  |  |
Increase decrease in cash and cash equivalents during the period |  |  |  |  | 29 |  |  |  |  |  |  |  |  |  |  |
Increase decrease in assets |  |  |  |  | 159 |  |  |  |  |  |  |  |  |  |  |
Increase decrease in equity |  |  |  |  | (408) |  |  |  |  |  |  |  |  |  |  |
Increase decrease in non current liabilities |  |  |  |  | 401 |  |  |  |  |  |  |  |  |  |  |
Non-current portion of non-current borrowings |  |  |  |  |  |  |  |  |  |  |  | 10,716 | 10,318 |  |  |
Increase decrease in long term borrowings |  |  |  |  | 398 |  |  |  |  |  |  |  |  |  |  |
Increase decrease in deferred tax liabilities |  |  |  |  | 3 |  |  |  |  |  |  |  |  |  |  |
Current borrowings and current portion of non-current borrowings |  |  |  |  |  |  |  |  |  |  |  | 514 | 403 |  |  |
Increase decrease in current borrowings and current portion of noncurrent borrowings |  |  |  |  | 111 |  |  |  |  |  |  |  |  |  |  |
Trade and other current payables |  |  |  |  |  |  |  |  |  |  |  | $ 133 | $ 77 |  |  |
Increase decrease in trade and other current payables |  |  |  |  | 56 |  |  |  |  |  |  |  |  |  |  |
Increase decrease in equity and liabilities |  |  |  |  | $ 159 |  |  |  |  |  |  |  |  |  |  |
India, Rupees |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance sheet movements of associates companies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets | € |  | 1,026,000,000 |  | 1,026,000,000 |  |  | 380,000,000 |  |  |  |  |  |  |  |  |
Liabilities | € |  | 3,000,000 |  | 3,000,000 |  |  | 4,000,000 |  |  |  |  |  |  |  |  |
India, Rupees | IRB Infrastructure Trust (Private InvIT) [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance sheet movements of associates companies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Non-current assets | ₨ |  |  |  |  |  |  |  |  |  |  | ₨ 536,192 |  |  |  |  |
Current assets | ₨ |  |  |  |  |  |  |  |  |  |  | 15,719 |  |  |  |  |
Assets | ₨ |  |  |  |  |  |  |  |  |  |  | 551,911 |  |  |  |  |
Equity | ₨ |  |  |  |  |  |  |  |  |  |  | (240,784) |  |  |  |  |
Non-current liabilities | ₨ |  |  |  |  |  |  |  |  |  |  | 297,474 |  |  |  |  |
Current liabilities | ₨ |  |  |  |  |  |  |  |  |  |  | 13,653 |  |  |  |  |
Equity and liabilities | ₨ |  |  |  |  |  |  |  |  |  |  | 551,911 |  |  |  |  |
Group´s share in equity (23.99%) | ₨ |  |  | ₨ 57,769 |  |  |  |  |  |  |  |  |  |  |  |  |
India, Rupees | IRB Infrastructure Trust (Private InvIT) [Member] | Ferrovial SA [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance sheet movements of associates companies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Profit (loss) from continuing operations | ₨ |  |  | (3,131) |  |  |  |  |  |  |  |  |  |  |  |  |
Comprehensive income | ₨ |  |  | (3,131) |  |  |  |  |  |  |  |  |  |  |  |  |
Group´s share in equity (23.99% Million EUR) | € |  | (8,000,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |
Group´s share in equity (23.99%) | ₨ |  |  | (751) |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue | ₨ |  |  | ₨ 22,040 |  |  |  |  |  |  |  |  |  |  |  |  |
India, Rupees | IRB Infrastructure Trust (Private InvIT) [Member] | Fair value recognised on acquisition June [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance sheet movements of associates companies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Non-current assets | ₨ |  |  |  |  |  |  |  |  |  |  | 537,578 |  |  |  |  |
Current assets | ₨ |  |  |  |  |  |  |  |  |  |  | 13,799 |  |  |  |  |
Assets | ₨ |  |  |  |  |  |  |  |  |  |  | 551,377 |  |  |  |  |
Equity | ₨ |  |  |  |  |  |  |  |  |  |  | (245,257) |  |  |  |  |
Non-current liabilities | ₨ |  |  |  |  |  |  |  |  |  |  | 294,852 |  |  |  |  |
Current liabilities | ₨ |  |  |  |  |  |  |  |  |  |  | 11,268 |  |  |  |  |
Equity and liabilities | ₨ |  |  |  |  |  |  |  |  |  |  | 551,377 |  |  |  |  |
Group´s share in equity (23.99%) | ₨ |  |  |  |  |  | ₨ 58,842 |  |  |  |  |  |  |  |  |  |
India, Rupees | IRB infrastructure developers limited [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance sheet movements of associates companies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Non-current assets | ₨ |  |  |  |  |  |  |  |  |  |  | 405,626 |  |  |  | ₨ 388,946 |
Current assets | ₨ |  |  |  |  |  |  |  |  |  |  | 46,158 |  |  |  | 55,742 |
Assets | ₨ |  |  |  |  |  |  |  |  |  |  | 451,784 |  |  |  | 444,688 |
Equity | ₨ |  |  |  |  |  |  |  |  |  |  | (141,663) |  |  |  | (139,195) |
Non-current liabilities | ₨ |  |  |  |  |  |  |  |  |  |  | 273,464 |  |  |  | 238,920 |
Current liabilities | ₨ |  |  |  |  |  |  |  |  |  |  | 36,657 |  |  |  | 66,573 |
Equity and liabilities | ₨ |  |  |  |  |  |  |  |  |  |  | 451,784 |  |  |  | 444,688 |
India, Rupees | IRB infrastructure developers limited [Member] | Ferrovial SA [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance sheet movements of associates companies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Profit (loss) from continuing operations | ₨ |  |  |  |  |  | 5,096 |  | ₨ 5,205 |  |  |  |  |  |  |  |
Other comprehensive income, before tax | ₨ |  |  |  |  |  | (1,440) |  | 407 |  |  |  |  |  |  |  |
Total comprehensive income | ₨ |  |  |  |  |  |  |  |  |  |  | ₨ 3,656 |  |  |  | ₨ 5,612 |
Group´s share in equity (19.86% and 24.86% post and pre-sale, respectively) | € |  | 1,534,000,000 |  | 1,534,000,000 |  |  | 1,294,000,000 |  |  |  |  |  |  |  |  |
Group´s share in equity (Million EUR) | € |  | € 13,000,000 |  | € 13,000,000 |  |  | € 14,000,000 |  |  |  |  |  |  |  |  |
Revenue | ₨ |  |  |  |  |  | ₨ 72,806 |  | ₨ 69,677 |  |  |  |  |  |  |  |

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