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Capital and financing structure (Details) - EUR (€) € in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Capital and financing structure [Abstract] |  |  |
Equity attributable to owners of parent | € 6,075 | € 3,766 | € 4,233
Profit (loss), attributable to owners of parent | 3,239 | 341 | 188
Increase decrease income and expense recognized directlyIn equity attributed to shareholders | 158 |  |
Total other comprehensive income reclassified to profit or loss, net of tax | (15) | 8 | 131
Increase decrease share holder remuneration equity attributed to shareholders | (831) |  |
Increase (decrease) through share-based payment transactions, equity | 13 | € 12 | € 0
Increase decrease share treasury transactions | (272) |  |
Increase decrease other equity attributed to shareholderss | € 17 |  |

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- Definition Increase decrease income and expense recognized directly in equity attributed to shareholders + References No definition available. + Details
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- Definition Increase decrease share holder remuneration equity attributed to shareholders + References No definition available. + Details
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- Definition The amount of equity attributable to the owners of the parent. This specifically excludes non-controlling interest. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 54 -Subparagraph r -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_54_r&doctype=Standard -URIDate 2024-03-27 + Details
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