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Financial Risk Management and Financial Instruments - Other Long Term Investments (Details) - EUR (€) € in Millions | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Disclosure of detailed information about financial instruments [abstract] |  |  |
At January 1 | € 16 | € 16 | € 0
Initial recognition of long term investment | 9 | 0 | 16
Changes in fair value recorded in other comprehensive income | 29 | 0 | 0
Changes in fair value recognized in profit or loss | (5) | 0 | 0
At December 31 | € 49 | € 16 | € 16

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- Definition Gains (losses) on financial assets measured at fair value through other comprehensive income, other long term investment + References No definition available. + Details
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- Definition Increase From Initial Recognition Of Long Term Investment, Other + References No definition available. + Details
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- Definition Long-Term Investments, Other + References No definition available. + Details
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- References No definition available. + Details
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- Definition The gains (losses) on financial assets at fair value through profit or loss. [Refer: Financial assets at fair value through profit or loss] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2020-01-01 -Paragraph 20 -Subparagraph a -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2020-en-r&anchor=para_20_a_i&doctype=Standard -URIDate 2020-01-01 + Details
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