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Provisions for contingencies (Details Textual) € in Millions, $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2018 EUR (€) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 EUR (€)
Disclosure of other Provisions Contingent Liabilities and Contingent Assets Explanatory [Line Items] |  |  |
Provision for decommissioning, restoration and rehabilitation costs |  | $ 7,757 | € 7,638
Loss Adjustments and Actuarial Provisions [Member] |  |  |
Disclosure of other Provisions Contingent Liabilities and Contingent Assets Explanatory [Line Items] |  |  |
Reinsurance contracts receivable | € 236 |  |
Refining And Marketing [Member] |  |  |
Disclosure of other Provisions Contingent Liabilities and Contingent Assets Explanatory [Line Items] |  |  |
Environment related provision | 348 |  |
Exploration & Production [Member] |  |  |
Disclosure of other Provisions Contingent Liabilities and Contingent Assets Explanatory [Line Items] |  |  |
Legal proceedings provision | 653 |  |
Provision for taxes | 397 |  |
Gas And Power Segment [Member] |  |  |
Disclosure of other Provisions Contingent Liabilities and Contingent Assets Explanatory [Line Items] |  |  |
Legal proceedings provision | 503 |  |
Syndial SpA [Member] |  |  |
Disclosure of other Provisions Contingent Liabilities and Contingent Assets Explanatory [Line Items] |  |  |
Environment related provision | 2,009 |  |
ISAF SpA [Member] |  |  |
Disclosure of other Provisions Contingent Liabilities and Contingent Assets Explanatory [Line Items] |  |  |
Profit (loss) on disposal of investments and changes in value of investments | € 114 |  |
Bottom of range [member] |  |  |
Disclosure of other Provisions Contingent Liabilities and Contingent Assets Explanatory [Line Items] |  |  |
Discount rate used in current estimate of value in use | 0.20% | 0.20% | 0.01%
Top of range [member] |  |  |
Disclosure of other Provisions Contingent Liabilities and Contingent Assets Explanatory [Line Items] |  |  |
Discount rate used in current estimate of value in use | 6.10% | 6.10% | 5.98%
Exploration Production Segment [Member] |  |  |
Disclosure of other Provisions Contingent Liabilities and Contingent Assets Explanatory [Line Items] |  |  |
Provision for decommissioning, restoration and rehabilitation costs | € 6,266 |  |
Oil and natural gas [Member] |  |  |
Disclosure of other Provisions Contingent Liabilities and Contingent Assets Explanatory [Line Items] |  |  |
Decommissioning costs Revision of Previous Estimates | 502 |  |
Increase (decrease) through change in discount rate, other provisions | € 259 |  |

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