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Income taxes (Details) - EUR (€) € in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Current taxes: |  |  |
Current taxes | € 5,228 | € 5,370 | € 4,021
Net deferred taxes: |  |  |
Net deferred taxes | 363 | 600 | (554)
Income tax expense | 5,591 | 5,970 | 3,467
Italy |  |  |
Current taxes: |  |  |
Current taxes | 347 | 301 | 712
Net deferred taxes: |  |  |
Net deferred taxes | 599 | 130 | (464)
Foreign current income tax expense | 137 |  |
Exploration & Production | Foreign (outside Italy) |  |  |
Current taxes: |  |  |
Current taxes | 4,729 | 4,906 | 3,167
Net deferred taxes: |  |  |
Net deferred taxes | (172) | 497 | (162)
Other segments | Foreign (outside Italy) |  |  |
Current taxes: |  |  |
Current taxes | 152 | 163 | 142
Net deferred taxes: |  |  |
Net deferred taxes | € (64) | € (27) | € 72

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