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Non-current and current inventories (Details Textual) - EUR (€) € in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Inventories [Line Items] |  |
Current raw materials | € 889 | € 999
Inventories pledged as security for liabilities | 95 | 86
Current finished goods | 2,274 | 2,000
Inventory written Down Provision | 578 | 245
Inventory Held for Compliance Purpose | 1,217 | 1,283
Gas and petroleum products [Member] |  |
Inventories [Line Items] |  |
Current finished goods | 1,543 | 1,287
oil and petroleum [Member] |  |
Inventories [Line Items] |  |
Inventory Held for Compliance Purpose | 1,200 | 1,267
Crude Oil and Oil Products [Member] |  |
Inventories [Line Items] |  |
Inventory written Down Provision | 337 |
Exploration & Production [Member] |  |
Inventories [Line Items] |  |
Current raw materials | 1,334 | 1,441
Chemical products [Member] |  |
Inventories [Line Items] |  |
Current finished goods | € 547 | € 489

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