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Corporate income tax and deferred taxes credits (Details) - Continuining operations of the company [Member] - EUR (€) € in Millions | Dec. 31, 2024 | Dec. 31, 2023
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Deferred tax assets item [Line Items] |  |
Tax-loss carryforwards | € 3,691 | € 3,549
Maximum tax credit | 887 | 853
Tax credit recognise | 517 | 473
US tax consolidated group [Member] |  |
Deferred tax assets item [Line Items] |  |
Tax-loss carryforwards | 2,138 | 1,790
Maximum tax credit | 493 | 409
Tax credit recognise | 443 | 376
Spanish tax consolidated group [Member] |  |
Deferred tax assets item [Line Items] |  |
Tax-loss carryforwards | 303 | 585
Maximum tax credit | 76 | 146
Tax credit recognise | 23 | 36
TURKIYE |  |
Deferred tax assets item [Line Items] |  |
Tax-loss carryforwards | 107 | 81
Maximum tax credit | 27 | 20
Tax credit recognise | 0 | 0
CANADA |  |
Deferred tax assets item [Line Items] |  |
Tax-loss carryforwards | 28 | 106
Maximum tax credit | 7 | 28
Tax credit recognise | 0 | 20
UNITED KINGDOM |  |
Deferred tax assets item [Line Items] |  |
Tax-loss carryforwards | 218 | 201
Maximum tax credit | 55 | 50
Tax credit recognise | 0 | 5
Other countries [Member] |  |
Deferred tax assets item [Line Items] |  |
Tax-loss carryforwards | 579 | 559
Maximum tax credit | 146 | 141
Tax credit recognise | 41 | 36
Netherlands tax consolidated group [Member] |  |
Deferred tax assets item [Line Items] |  |
Tax-loss carryforwards | 288 | 227
Maximum tax credit | 74 | 59
Tax credit recognise | 10 | € 0
AUSTRALIA |  |
Deferred tax assets item [Line Items] |  |
Tax-loss carryforwards | 30 |
Maximum tax credit | 9 |
Tax credit recognise | € 0 |

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- Details
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