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Deferred tax liabilities (Details 3) - EUR (€) € in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016
Disclosure Of Deferred Tax Liabilities [Abstract] |  |
Deferred Tax Liabilities Gross | € 10,953 | € 10,780
Additions, Deferred Tax Liabilities Gross | 1,171 | 1,796
Deductions, Deferred Tax Liabilities Gross | (835) | (1,486)
Currency Translation Differences, Deferred Tax Liabilities Gross | (1,123) | 229
Other Changes, Deferred Tax Liabilities Gross | 3 | (366)
Deferred Tax Liabilities Gross | 10,169 | 10,953
Deferred Tax Assets, Gross | (13,698) | (12,307)
Additions Deferred Tax Assets Gross | (2,341) | (2,994)
Deductions Deferred Tax Assets Gross | 1,588 | 1,208
Currency Translation Differences Deferred Tax Assets Gross | 862 | (185)
Other Changes Deferred Tax Assets Gross | (20) | 580
Deferred Tax Assets, Gross | (13,609) | (13,698)
Provision For Impairments Deferred Tax Assets | 5,622 | 5,099
Additions Deferred Tax Assets Impairments | 212 | 667
Deductions Deferred Tax Assets Impairments | (349) | (254)
Currency Translation Differences Deferred Tax Assets Impairments | (202) | 80
Other Changes Deferred Tax Assets Impairments | (21) | 30
Provision For Impairments Deferred Tax Assets | 5,262 | 5,622
Deferred Tax Assets, Net of Valuation Allowance | (8,076) | (7,208)
Additions Deferred Tax Assets Net | (2,129) | (2,327)
Deductions Deferred Tax Assets Net | 1,239 | 954
Currency Translation Differences Deferred Tax Assets Net | 660 | (105)
Other Changes Deferred Tax Assets Net | (41) | 610
Deferred Tax Assets, Net of Valuation Allowance | (8,347) | (8,076)
Net deferred tax liabilities | 2,877 | 3,572
Additions Deferred Tax Liabilities Net | (958) | (531)
Deductions Deferred Tax Liabilities Net | 404 | (532)
Currency Translation Differences Deferred Tax Liabilities Net | (463) | 124
Other Changes Deferred Tax Liabilities Net | (38) | 244
Net deferred tax liabilities | € 1,822 | € 2,877

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