Income taxes - Changes net deferred taxes (Details) - EUR (€) € in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Movements in net deferred tax balance
Net deferred tax balance, as of January 1	€ 1,562	€ 4,734	€ 4,561
Adoption of new IFRS standards			(1)
Recognized in income statement, continuing operations	137	(2,961)	229
Recognized in income statement, discontinuing operations		1
Recognized in other comprehensive income	(753)	(115)	(84)
Recognized in equity		2	(7)
Acquisitions through business combinations and disposals	(6)	4
Translation differences	50	(103)	36
Net deferred tax balance, as of December 31	€ 990	€ 1,562	€ 4,734

The amount of tax expense or income relating to changes in deferred tax liabilities and deferred tax assets, recognised in profit or loss. [Refer: Deferred tax assets; Deferred tax expense (income); Deferred tax liabilities]

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The amount of deferred tax liabilities or assets. [Refer: Deferred tax liabilities; Deferred tax assets]

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The amount of deferred tax related to items credited (charged) directly to equity. [Refer: Deferred tax expense (income)]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

The increase (decrease) in deferred tax liability (asset) resulting from business combinations. [Refer: Deferred tax liability (asset)]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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The increase (decrease) in deferred tax liability (asset) resulting from the net exchange differences arising when the financial statements are translated from the functional currency into a different presentation currency, including the translation of a foreign operation into the presentation currency of the reporting entity. [Refer: Deferred tax liability (asset)]

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The amount of tax expense or income relating to changes in deferred tax liabilities and deferred tax assets, recognized in profit or loss from discontinued operations.

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The amount of deferred income tax relating to amounts recognised in other comprehensive income.

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The increase (decrease) in deferred tax liability (asset) resulting from adoption of new accounting standard(s).

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