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Financial risk and capital management (Details) - EUR (€) € in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Detailed information about the group borrowings [Line Items] |  |
Borrowings | € 11,288 | € 11,378
Percentage of borrowing cosidered to be hedged | 96.00% | 97.00%
Net exposed debt | € 503 | € 343
Impact on profit loss plus 100 bps | 5 | 4
Infrastructure project [Member] |  |
Detailed information about the group borrowings [Line Items] |  |
Borrowings | € 8,400 | € 7,915
Percentage of borrowing cosidered to be hedged | 97.00% | 99.00%
Net exposed debt | € 251 | € 83
Impact on profit loss plus 100 bps | 2 | 1
Infrastructure project [Member] | Toll roads division [Member] |  |
Detailed information about the group borrowings [Line Items] |  |
Borrowings | € 7,945 | € 7,410
Percentage of borrowing cosidered to be hedged | 97.00% | 99.00%
Net exposed debt | € 237 | € 51
Impact on profit loss plus 100 bps | 2 | 1
Infrastructure project [Member] | Construction division [Member] |  |
Detailed information about the group borrowings [Line Items] |  |
Borrowings | € 103 | € 106
Percentage of borrowing cosidered to be hedged | 90.00% | 91.00%
Net exposed debt | € 10 | € 10
Impact on profit loss plus 100 bps | 0 | 0
Infrastructure project [Member] | Energy and mobility infrastructures division [Member] |  |
Detailed information about the group borrowings [Line Items] |  |
Borrowings | € 211 | € 246
Percentage of borrowing cosidered to be hedged | 100.00% | 93.00%
Net exposed debt | € 0 | € 18
Impact on profit loss plus 100 bps | 0 | 0
Infrastructure project [Member] | Airports division [Member] |  |
Detailed information about the group borrowings [Line Items] |  |
Borrowings | € 94 | € 104
Percentage of borrowing cosidered to be hedged | 96.00% | 100.00%
Net exposed debt | € 4 | € 0
Impact on profit loss plus 100 bps | 0 | 1
Infrastructure project [Member] | Resto division [Member] |  |
Detailed information about the group borrowings [Line Items] |  |
Borrowings | € 47 | € 49
Percentage of borrowing cosidered to be hedged | 100.00% | 93.00%
Net exposed debt | € 0 | € 4
Impact on profit loss plus 100 bps | 0 | 0
Exinfrastructure project [Member] |  |
Detailed information about the group borrowings [Line Items] |  |
Borrowings | € 2,886 | € 3,463
Percentage of borrowing cosidered to be hedged | 91.00% | 92.00%
Net exposed debt | € 255 | € 260
Impact on profit loss plus 100 bps | € 3 | € 3

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