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Finance debt - Fair value of long-term debt (Details) - EUR (€) € in Millions | Dec. 31, 2023 | Dec. 31, 2022
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Borrowings |  |
Financial liabilities, at fair value | € 24,243 | € 21,011
Long-term and current portion of long-term ordinary bonds and sustainability-linked bond |  |
Borrowings |  |
Financial liabilities, at fair value | 21,025 | 18,167
Long-term and current portion of long-term convertible sustainability-linked bonds |  |
Borrowings |  |
Financial liabilities, at fair value | 1,061 |
Long-term and current portion of long-term bank debt |  |
Borrowings |  |
Financial liabilities, at fair value | 1,652 | 2,733
Long-term and current portion of long-term debt with other financial institutions |  |
Borrowings |  |
Financial liabilities, at fair value | € 505 | € 111

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