Analysis Of Income And Expense [Abstract]
| Concept |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Analysis of income and expense [abstract] | ||||||||||||
| Revenue [abstract] | ||||||||||||
| Revenue from rendering of services | — | — |
329,000,000
EUR
|
— | — | — | — | — |
383,000,000
EUR
|
— | — | — |
| Revenue from construction contracts | — | — |
2 442,3
EUR
|
— | — | — | — | — |
2 413,7
EUR
|
— | — | — |
| Interest income | — | — | — | — | — | — | — | — | — | — | — | — |
| Interest income on cash and cash equivalents | — | — |
293,000,000
EUR
|
— | — | — | — | — |
131,000,000
EUR
|
— | — | — |
| Material income and expense [abstract] | ||||||||||||
| Finance income (cost) | — | — | — | — | — | — | — | — | — | — | — | — |
| Other finance income (cost) | — | — |
139,000,000
EUR
|
— | — | — | — | — |
140,000,000
EUR
|
— | — | — |
| Other operating income (expense) | — | — |
31,000,000
EUR
|
— | — | — | — | — |
59,000,000
EUR
|
— | — | — |
| Miscellaneous other operating expense | — | — |
823,000,000
EUR
|
— | — | — | — | — |
1,054,000,000
EUR
|
— | — | — |
| Sales and marketing expense | — | — |
749,000,000
EUR
|
— | — | — | — | — |
893,000,000
EUR
|
— | — | — |
| Trading income (expense) [abstract] | ||||||||||||
| Trading income (expense) | — | — |
21,000,000
EUR
|
— | — | — | — | — |
(0,0)
EUR
|
— | — | — |
| Expenses by nature [abstract] | ||||||||||||
| Classes of employee benefits expense [abstract] | ||||||||||||
| Employee benefits expense | — | — |
1,749,000,000
EUR
|
— | — | — | — | — |
1,779,000,000
EUR
|
— | — | — |
| Miscellaneous other comprehensive income [abstract] | ||||||||||||
| Other comprehensive income, attributable to non-controlling interests | — | — |
115,000,000
EUR
|
— | — | — | — | — |
4,000,000
EUR
|
— | — | — |
| Share of profit (loss) of associates and joint ventures accounted for using equity method [abstract] | ||||||||||||
| Share of profit (loss) of associates and joint ventures accounted for using equity method | — | — |
111,000,000
EUR
|
— | — | — | — | — |
36,000,000
EUR
|
— | — | — |
| Comprehensive income, continuing and discontinued operations [abstract] | ||||||||||||
| Comprehensive income |
115,000,000
EUR
|
–
EUR
|
484,000,000
EUR
|
599,000,000
EUR
|
–
EUR
|
599,000,000
EUR
|
–
EUR
|
–
EUR
|
3,254,000,000
EUR
|
3,250,000,000
EUR
|
4,000,000
EUR
|
3,250,000,000
EUR
|
| Comprehensive income attributable to owners of parent, continuing and discontinued operations [abstract] | ||||||||||||
| Comprehensive income, attributable to owners of parent | — | — |
599,000,000
EUR
|
— | — | — | — | — |
3,250,000,000
EUR
|
— | — | — |