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Operations Classified as Held for Sale - Balance Sheet Breakdown Of Asset Held For Sale And Liabilities Assumed (Details) - EUR (€) € in Millions | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | --- | ---
Disclosure of subsidiaries [line items] |  |  |
Fiber optic assets in Peru | € 78,133 | € 83,568 |
Goodwill | 16,461 | 18,708 |
Property, plant and equipment | 21,439 | 22,944 | € 23,714
Others | 2,064 | 2,067 |
Investment in Nabiax | 232 | 325 |
Non-current assets and disposal groups held for sale | 138 | 273 |
Liabilities associated with non-current assets and disposal groups held for sale | 33 | 37 |
Disposal groups classified as held for sale |  |  |
Disclosure of subsidiaries [line items] |  |  |
Other assets | 3 | 0 |
Disposal groups classified as held for sale | Peru |  |  |
Disclosure of subsidiaries [line items] |  |  |
Fiber optic assets in Peru | 77 | 273 |
Goodwill | 0 | 34 |
Property, plant and equipment | 33 | 198 |
Others | 44 | 41 |
Investment in Nabiax | 58 | 0 |
Total allocated liabilities | € 33 | € 37 |

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