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Finance debts - Fair value of long-term debt (Details) - EUR (€) € in Millions | Dec. 31, 2019 | Dec. 31, 2018
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Long-term debt and current portion of long-term debt |  |
Borrowings |  |
Financial liabilities, at fair value | € 22,528 | € 24,212
Long-term and current portion of long-term ordinary bonds |  |
Borrowings |  |
Financial liabilities, at fair value | 19,173 | 20,257
Long-term and current portion of long-term convertible bonds |  |
Borrowings |  |
Financial liabilities, at fair value | 402 | 399
Long-term and current portion of long-term bank debt |  |
Borrowings |  |
Financial liabilities, at fair value | 2,904 | 3,445
Long-term and current portion of long-term debt with other financial institutions |  |
Borrowings |  |
Financial liabilities, at fair value | € 49 | € 111

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- Definition The fair value of financial liabilities. [Refer: At fair value [member]; Financial liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2019-01-01 -Paragraph 25 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_25&doctype=Standard -URIDate 2019-03-27 + Details
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