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Other operating expenses (Details) - EUR (€) € in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Other operating expenses [Line Items] |  |  |
Increase decrease in other operating expenses | € (53) | € (696) |
Miscellaneous other operating expense | 4,931 | 4,878 | € 4,182
Subcontracted Work [Member] |  |  |
Other operating expenses [Line Items] |  |  |
Increase decrease in other operating expenses | (213) | (362) |
Miscellaneous other operating expense | 3,550 | 3,337 | 2,975
Leases expenses [Member] |  |  |
Other operating expenses [Line Items] |  |  |
Increase decrease in other operating expenses | (6) | 6 |
Miscellaneous other operating expense | 257 | 251 | 257
Repairs and maintenance [Member] |  |  |
Other operating expenses [Line Items] |  |  |
Increase decrease in other operating expenses | 7 | 7 |
Miscellaneous other operating expense | 75 | 82 | 89
Independent professional services [Member] |  |  |
Other operating expenses [Line Items] |  |  |
Increase decrease in other operating expenses | 31 | (36) |
Miscellaneous other operating expense | 454 | 485 | 449
Changes in provisions for liabilities [Member] |  |  |
Other operating expenses [Line Items] |  |  |
Increase decrease in other operating expenses | (89) | 121 |
Miscellaneous other operating expense | 36 | 53 | 68
Other operating expenses [Member] |  |  |
Other operating expenses [Line Items] |  |  |
Increase decrease in other operating expenses | 39 | (190) |
Miscellaneous other operating expense | € 631 | € 670 | € 480

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- Definition The amount of miscellaneous other operating expenses. [Refer: Other operating income (expense)] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 112 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_112_c&doctype=Standard -URIDate 2024-03-27 + Details
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