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Financial Risk Management and Financial Instruments - Summary of Changes in Investments (Details) - EUR (€) € in Millions | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Disclosure Of Financial Risk Management And Financial Instruments [Line Items] |  |  |
At January 1 | € 1,497 |  |
At December 31 | 2,277 | € 1,497 |
Tencent Music Entertainment Group |  |  |
Disclosure Of Financial Risk Management And Financial Instruments [Line Items] |  |  |
At January 1 | 1,481 | 1,630 | € 910
Changes in fair value recorded in other comprehensive income (loss) | 747 | (149) | 720
At December 31 | € 2,228 | € 1,481 | € 1,630

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- Definition Gains (losses) on the value of long term investments. + References No definition available. + Details
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- Details
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