Finance Income and Costs - Summary of Finance Income and Cost (Details) - EUR (€) € in Millions	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Finance income
Fair value movements on derivative liabilities	€ 182	€ 376	€ 97
Interest income	31	25	19
Other financial income	1	11	2
Foreign exchange gains	61	43	0
Total	275	455	118
Finance costs
Fair value movements on derivative liabilities	(235)	(360)	(303)
Fair value movements on Convertible Notes	0	(201)	(524)
Interest expense on lease liabilities	(38)	0	0
Interest, bank fees and other costs	(5)	(6)	(4)
Foreign exchange losses	(55)	(17)	(143)
Total	€ (333)	€ (584)	€ (974)

Finance costs.

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Finance income.

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Losses on change in fair value movements on convertible notes.

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The amount of bank and similar charges recognised by the entity as an expense.

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The amount of costs associated with financing activities of the entity.

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The amount of income associated with interest and other financing activities of the entity.

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The gains resulting from change in the fair value of derivatives recognised in profit or loss. [Refer: Derivatives [member]]

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The amount of interest expense on lease liabilities. [Refer: Lease liabilities]

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The losses resulting from changes in the fair value of derivatives recognised in profit or loss. [Refer: Derivatives [member]]

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The net gain arising from foreign exchange differences. [Refer: Foreign exchange gain (loss)]

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The net loss arising from foreign exchange differences. [Refer: Foreign exchange gain (loss)]

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The amount of operating income that the entity does not separately disclose in the same statement or note.

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The amount of income arising from interest.

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