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Deferred tax assets and liabilities - Changes in deferred tax liabilities and assets (Details) - EUR (€) € in Millions | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020
Deferred tax liabilities, gross |  |
Deferred tax assets and liabilities |  |
Deferred tax liability (asset) at beginning of year | € 8,581 | € 9,583
Additions | 1,977 | 960
Deductions | (765) | (1,326)
Currency translation differences | 683 | (725)
Other changes | 192 | 89
Deferred tax liability (asset) at end of year | 10,668 | 8,581
Deferred tax assets, gross |  |
Deferred tax assets and liabilities |  |
Deferred tax liability (asset) at beginning of year | (16,231) | (15,767)
Additions | (1,783) | (2,649)
Deductions | 1,804 | 1,357
Currency translation differences | (682) | 742
Other changes | (258) | 86
Deferred tax liability (asset) at end of year | (17,150) | (16,231)
Accumulated impairment |  |
Deferred tax assets and liabilities |  |
Deferred tax liability (asset) at beginning of year | 9,065 | 6,744
Additions | 270 | 2,638
Deductions | (863) | (130)
Currency translation differences | 186 | (192)
Other changes | (54) | 5
Deferred tax liability (asset) at end of year | 8,604 | 9,065
Deferred tax assets net of impairment before offsetting |  |
Deferred tax assets and liabilities |  |
Deferred tax liability (asset) at beginning of year | (7,166) | (9,023)
Additions | (1,513) | (11)
Deductions | 941 | 1,227
Currency translation differences | (496) | 550
Other changes | (312) | 91
Deferred tax liability (asset) at end of year | € (8,546) | € (7,166)

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- Definition Increase (decrease) through additions, deferred tax liability (asset) + References No definition available. + Details
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- Definition Increase (decrease) through deductions, deferred tax liability (asset) + References No definition available. + Details
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- Definition The amount of deferred tax liabilities or assets. [Refer: Deferred tax liabilities; Deferred tax assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2021-01-01 -Paragraph 81 -Subparagraph g -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2021-en-r&anchor=para_81_g_i&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition 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)] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 12 -IssueDate 2021-01-01 -Paragraph 81 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2021-en-r&anchor=para_81&doctype=Standard -URIDate 2021-03-24 + Details
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