Issued Share Capital and Other Reserves - Summary of Other Reserves (Details) - EUR (€) € in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Currency translation
Currency translation, beginning balance	€ (54)	€ (11)	€ (15)
Currency translation	71	(43)	4
Currency translation, ending balance	17	(54)	(11)
Short term and long term investments
Tax effect of gain on sale of long term investment reclassified to accumulated deficit	30
Cash flow hedges
Cash flow hedges, beginning balance	(3)	(4)	(1)
(Losses)/gains on fair value that may be subsequently reclassified to consolidated statement of operations	(11)	5	(7)
Losses/(gains) reclassified to revenue	51	(15)	10
(Gains)/losses reclassified to cost of revenue	(40)	11	(7)
Deferred tax	(1)	0	1
Cash flow hedges, ending balance	(4)	(3)	(4)
Share-based compensation
Share-based payments, beginning balance	680	494	334
Share-based compensation (Note 19)	222	181	127
Income tax impact associated with share-based compensation (Note 10)	21	34	26
Issuance of share-based compensation in conjunction with business combinations (Note 5)	0	0	13
Restricted stock units withheld for employee taxes	(54)	(29)	(6)
Share-based payments,ending balance	869	680	494
Other reserves, ending balance	853	1,687	924
Reserve of gains and losses on financial assets measured at fair value through other comprehensive income
Short term and long term investments
Investments, beginning balance	5	1	(4)
(Losses)/gains on fair value that may be subsequently reclassified to consolidated statement of operations	(8)	8	7
Gains reclassified to consolidated statement of operations	(2)	(3)	0
Deferred tax	2	(1)	(2)
Investments, ending balance	(3)	5	1
Reserve of gains and losses from investments in equity instruments
Short term and long term investments
Investments, beginning balance	1,059	444	561
(Losses)/gains on fair value that may be subsequently reclassified to consolidated statement of operations	(1,218)	777	(149)
Gain on sale of long term investment reclassified to accumulated deficit	(134)	0	0
Tax effect of gain on sale of long term investment reclassified to accumulated deficit	30	0	0
Deferred tax	237	(162)	32
Investments, ending balance	€ (26)	€ 1,059	€ 444

Gain (Loss) On Sale Of Long Term Investment Reclassified To Retained Earnings (Accumulated Deficit)

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Gains (Losses) on Cash Flow Hedges

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Issuance of share based payments in conjunction with business combinations.

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The amount of reclassification adjustments related to cash flow hedges, before tax. The reclassification adjustments are amounts reclassified to Cost of Revenue in the current period that were recognized in other comprehensive income in the current or previous periods.

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The amount of reclassification adjustments related to cash flow hedges, before tax. The reclassification adjustments are amounts reclassified to Revenue in the current period that were recognized in other comprehensive income in the current or previous periods.

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The decrease in equity through restricted stock units withheld for employee taxes.

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Short term and long term investments.

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Tax Effect Of Gain (Loss) On Sale Of Long Term Investment Reclassified To Accumulated Deficit

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The decrease (increase) in equity resulting from tax on transactions in which the entity: (a) receives goods or services from the supplier of those goods or services (including an employee) in a share-based payment arrangement; or (b) incurs an obligation to settle the transaction with the supplier in a share-based payment arrangement when another group entity receives those goods or services. [Refer: Share-based payment arrangements [member]]

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The gains (losses) recognised in other comprehensive income on exchange differences on the translation of financial statements of foreign operations, before tax, before reclassification adjustments. [Refer: Other comprehensive income]

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The gains (losses) recognised in other comprehensive income on financial assets measured at fair value through other comprehensive income applying paragraph 4.1.2A of IFRS 9, before tax, before reclassification adjustments. [Refer: Financial assets measured at fair value through other comprehensive income; Other comprehensive income]

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The amount of income tax relating to amounts recognised in other comprehensive income in relation to cash flow hedges. [Refer: Cash flow hedges [member]; Other comprehensive income]

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The amount of income tax relating to amounts recognised in other comprehensive income in relation to financial assets measured at fair value through other comprehensive income applying paragraph 4.1.2A of IFRS 9. [Refer: Financial assets measured at fair value through other comprehensive income; Other comprehensive income]

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The amount of income tax relating to amounts recognised in other comprehensive income in relation to investments in equity instruments that the entity has designated at fair value through other comprehensive income applying paragraph 5.7.5 of IFRS 9. [Refer: Other comprehensive income; Reserve of gains and losses from investments in equity instruments]

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The increase (decrease) in equity resulting from share-based payment transactions. [Refer: Equity]

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A component of equity representing reserves within equity, not including retained earnings. [Refer: Retained earnings]

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The amount of reclassification adjustments related to financial assets measured at fair value through other comprehensive income, before tax. Reclassification adjustments are amounts reclassified to profit (loss) in the current period that were recognised in other comprehensive income in the current or previous periods. [Refer: Financial assets measured at fair value through other comprehensive income; Other comprehensive income]

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A component of equity representing the accumulated portion of gain (loss) on a hedging instrument that is determined to be an effective hedge for cash flow hedges. [Refer: Cash flow hedges [member]]

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A component of equity representing exchange differences on translation of financial statements recognised in other comprehensive income and accumulated in equity. [Refer: Other comprehensive income]

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A component of equity representing the reserve of gains and losses on financial assets measured at fair value through other comprehensive income. [Refer: Financial assets measured at fair value through other comprehensive income; Other comprehensive income]

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A component of equity resulting from share-based payments.

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