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Other provisions, contingent liabilities and contingent assets - Narrative (Details) € in Millions, £ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2024 EUR (€) | Dec. 31, 2023 EUR (€) | Dec. 31, 2024 GBP (£) | Dec. 31, 2024 EUR (€) | Dec. 31, 2023 GBP (£) | Dec. 31, 2023 EUR (€)
Movements in long and short term provisions [Line Items] |  |  |  |  |  |
Provisions |  |  | £ 22 | € 1,311 | £ 40 | € 1,279
Isle of Wight treatment plant |  |  |  |  |  |
Movements in long and short term provisions [Line Items] |  |  |  |  |  |
Adjustments for provisions | € (37) |  |  |  |  |
UK waste treatment thalia [Member] |  |  |  |  |  |
Movements in long and short term provisions [Line Items] |  |  |  |  |  |
New provisions, other provisions | (16) |  |  |  |  |
Construction division [Member] | POLAND |  |  |  |  |  |
Movements in long and short term provisions [Line Items] |  |  |  |  |  |
Provisions |  |  |  | (17) |  |
Construction division [Member] | Colombia and US businesses |  |  |  |  |  |
Movements in long and short term provisions [Line Items] |  |  |  |  |  |
Provisions |  |  |  | (47) |  |
Provisions to cover the possible risks resulting from lawsuits and litigation in progress [Member] | Construction division [Member] |  |  |  |  |  |
Movements in long and short term provisions [Line Items] |  |  |  |  |  |
Provisions |  |  |  | 504 |  | 561
Provisions for tax claims [Member] | Provision for the estimated cost of landfill closure and post closure activities relating to budimex and waste treatment UK thalia member [Member] |  |  |  |  |  |
Movements in long and short term provisions [Line Items] |  |  |  |  |  |
Provisions |  |  |  | 26 |  | 46
Litigation and taxes [Member] | Construction division [Member] |  |  |  |  |  |
Movements in long and short term provisions [Line Items] |  |  |  |  |  |
Provisions |  |  |  | 90 |  | 68
Litigation and taxes [Member] | Provisions to cover the possible risks resulting from lawsuits and litigation in progress [Member] |  |  |  |  |  |
Movements in long and short term provisions [Line Items] |  |  |  |  |  |
Provisions |  |  |  | 97 |  | 71
Litigation and taxes [Member] | Provisions for tax claims [Member] |  |  |  |  |  |
Movements in long and short term provisions [Line Items] |  |  |  |  |  |
Provisions |  |  |  | 85 |  |
Replacement and upgrades IFRIC12 [Member] |  |  |  |  |  |
Movements in long and short term provisions [Line Items] |  |  |  |  |  |
Provisions |  |  |  | 145 |  | 86
Other Long term risks [Member] |  |  |  |  |  |
Movements in long and short term provisions [Line Items] |  |  |  |  |  |
Provisions |  |  |  | 26 |  | 26
Other Long term risks [Member] | Provision for the estimated cost of landfill closure and post closure activities relating to budimex and waste treatment UK thalia member [Member] |  |  |  |  |  |
Movements in long and short term provisions [Line Items] |  |  |  |  |  |
Provisions |  |  |  | 16 |  |
Non current provisions [Member] |  |  |  |  |  |
Movements in long and short term provisions [Line Items] |  |  |  |  |  |
Provisions |  |  |  | 353 |  | 268
Non current provisions [Member] | Construction division [Member] |  |  |  |  |  |
Movements in long and short term provisions [Line Items] |  |  |  |  |  |
Provisions |  |  |  | 325 |  | 313
Current provisions [Member] | Construction division [Member] |  |  |  |  |  |
Movements in long and short term provisions [Line Items] |  |  |  |  |  |
Increase decrease in provisions | € 531 | € 606 |  |  |  |
Current provisions [Member] | Trade provisions [Member] |  |  |  |  |  |
Movements in long and short term provisions [Line Items] |  |  |  |  |  |
Provisions |  |  |  | € 958 |  | € 1,011

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