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Derivative financial instruments and hedge accounting - Effects recognized in finance income (loss) (Details) - EUR (€) € in Millions | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Derivative financial instruments and hedge accounting |  |  |
Income (expense) from derivative financial instruments | € (14) | € (307) | € 837
Currency |  |  |
Derivative financial instruments and hedge accounting |  |  |
Income (expense) from derivative financial instruments | 9 | (329) | 809
Interest rate risk |  |  |
Derivative financial instruments and hedge accounting |  |  |
Income (expense) from derivative financial instruments | € (23) | € 22 | € 28

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- Definition Disclosure of derivative financial instruments + References No definition available. + Details
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- Definition The gains (losses) resulting from change in the fair value of derivatives recognised in profit or loss. [Refer: Derivatives [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 85 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_85&doctype=Standard -URIDate 2019-03-27 + Details
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- Details
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- Details
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