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Impairment/reversal of tangible and intangible assets (Details Textual) € in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2017 EUR (€) $ / bbl | Dec. 31, 2016 EUR (€)
DisclosureOfImpairmentOfAssetsExplanatoryLineItems [Line Items] |  |
Discount rate used in current measurement of fair value less costs of disposal | 0.00% |
Long Term Assumption, Benchmark Brent Price Previous Estimate | 71.4 |
Market Capitalisation | € 50,000 |
Assets (liabilities) | 48,000 |
Goodwill | 1,204 | € 1,320
Amount by which unit's recoverable amount exceeds its carrying amount | € 1,303 |
Long-term assumption for benchmark brent price | $ / bbl | 72 |
Decrease in average projected commercial margins Percentage | 65.00% |
Increase in projected discount rate | 9.70% |
Nominal Growth Rate | 16.80% |
Country Of Domicile [Member] |  |
DisclosureOfImpairmentOfAssetsExplanatoryLineItems [Line Items] |  |
Discount rate used in current measurement of fair value less costs of disposal | 4.60% |
Europe [Member] |  |
DisclosureOfImpairmentOfAssetsExplanatoryLineItems [Line Items] |  |
Discount rate used in current measurement of fair value less costs of disposal | 5.20% |
Goodwill | € 95 |
Individual Assets Or Cash generating Units [Member] |  |
DisclosureOfImpairmentOfAssetsExplanatoryLineItems [Line Items] |  |
Reversal of impairment loss | € 776 |
Bottom Of Range [Member] |  |
DisclosureOfImpairmentOfAssetsExplanatoryLineItems [Line Items] |  |
Weighted Average Cost of Capital, Percentage | 5.30% |
Discount rate applied to cash flow projections | (0.20%) | (0.20%)
Bottom Of Range [Member] | Individual Assets Or Cash generating Units [Member] |  |
DisclosureOfImpairmentOfAssetsExplanatoryLineItems [Line Items] |  |
Weighted Average Cost of Capital, Pre Tax Rate Percentage | 8.60% |
Top Of Range [Member] |  |
DisclosureOfImpairmentOfAssetsExplanatoryLineItems [Line Items] |  |
Weighted Average Cost of Capital, Percentage | 15.80% |
Discount rate applied to cash flow projections | 2.50% | 2.60%
Top Of Range [Member] | Individual Assets Or Cash generating Units [Member] |  |
DisclosureOfImpairmentOfAssetsExplanatoryLineItems [Line Items] |  |
Weighted Average Cost of Capital, Pre Tax Rate Percentage | 25.60% |
Oil & Gas and refining busines segment [Member] |  |
DisclosureOfImpairmentOfAssetsExplanatoryLineItems [Line Items] |  |
Weighted Average Cost of Capital, Marginal Decrease Percentage | 0.40% |
Weighted Average Cost of Capital, Percentage | 6.80% |
Chemical business line [Member] |  |
DisclosureOfImpairmentOfAssetsExplanatoryLineItems [Line Items] |  |
Weighted Average Cost of Capital, Marginal Decrease Percentage | 0.50% |
Weighted Average Cost of Capital, Percentage | 8.50% |
Gas & Power [Member] |  |
DisclosureOfImpairmentOfAssetsExplanatoryLineItems [Line Items] |  |
Weighted Average Cost of Capital, Marginal Decrease Percentage | 0.20% |
Weighted Average Cost of Capital, Percentage | 6.00% |
Goodwill | € 932 | € 1,025
Gas & Power [Member] | Country Of Domicile [Member] |  |
DisclosureOfImpairmentOfAssetsExplanatoryLineItems [Line Items] |  |
Goodwill | 835 | 835
Gas & Power [Member] | Europe [Member] |  |
DisclosureOfImpairmentOfAssetsExplanatoryLineItems [Line Items] |  |
Goodwill | 95 | 188
Refining & Marketing business line [Member] |  |
DisclosureOfImpairmentOfAssetsExplanatoryLineItems [Line Items] |  |
Impairment loss | 130 |
Gas & Power Segment [Member] |  |
DisclosureOfImpairmentOfAssetsExplanatoryLineItems [Line Items] |  |
Impairment loss | € 146 |
Refining activity [Member] |  |
DisclosureOfImpairmentOfAssetsExplanatoryLineItems [Line Items] |  |
Profitability margin per barrel | 5 |
Exploration & Production [Member] |  |
DisclosureOfImpairmentOfAssetsExplanatoryLineItems [Line Items] |  |
Goodwill | € 179 | € 202
Exploration & Production [Member] | Individual Assets Or Cash generating Units [Member] |  |
DisclosureOfImpairmentOfAssetsExplanatoryLineItems [Line Items] |  |
Reversal of impairment loss | 776 |
Impairment loss | € 636 |
Disclosure of amount of impairment loss based on which weighted average cost of capital is disclosed | WACC relating to reversals of impairments of more than €100 million |
Exploration & Production [Member] | Bottom Of Range [Member] | Individual Assets Or Cash generating Units [Member] |  |
DisclosureOfImpairmentOfAssetsExplanatoryLineItems [Line Items] |  |
Weighted Average Cost of Capital, Percentage | 5.50% |
Weighted Average Cost of Capital, Pre Tax Rate Percentage | 8.60% |
Exploration & Production [Member] | Top Of Range [Member] | Individual Assets Or Cash generating Units [Member] |  |
DisclosureOfImpairmentOfAssetsExplanatoryLineItems [Line Items] |  |
Weighted Average Cost of Capital, Percentage | 13.50% |
Weighted Average Cost of Capital, Pre Tax Rate Percentage | 25.60% |

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