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Impairment/reversal of tangible and intangible assets (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2017
StatementsLineItems [Line Items] |
Disclosure of impairment loss and reversal of impairment loss [text block] |
(€ million) |  | 2017 |  | 2016
Impairment losses |  |  |  |  |  |  |  |
Tangible assets |  |  | (848 | ) |  |  | (1,067 | )
Intangible assets |  |  | (14 | ) |  |  |  |
|  |  | (862 | ) |  |  | (1,067 | )
less: |  |  |  |  |  |  |  |
- reversal of tangible assets |  |  | 1,055 |  |  |  | 1,153 |
- reversal of intangible assets |  |  | 32 |  |  |  | 389 |
|  |  | 225 |  |  |  | 475 |
Disclosure of detailed information about impairments losses and the associated tax effect [text block] | A breakdown by segment of impairments of tangible assets recorded and the associated tax effect is provided below:
(€ million) |  | 2017 |  | 2016
Impairments |  |  |  |  |  |  |  |
Exploration & Production |  |  | (636 | ) |  |  | (740 | )
Gas & Power |  |  | (56 | ) |  |  | (167 | )
Refining & Marketing and Chemical |  |  | (131 | ) |  |  | (120 | )
Corporate and other activities |  |  | (25 | ) |  |  | (40 | )
|  |  | (848 | ) |  |  | (1,067 | )
Tax effects |  |  |  |  |  |  |  |
Exploration & Production |  |  | 91 |  |  |  | 216 |
Gas & Power |  |  | 12 |  |  |  | 35 |
Refining & Marketing and Chemical |  |  | 35 |  |  |  | 32 |
Corporate and other activities |  |  | 6 |  |  |  |  |
|  |  | 144 |  |  |  | 283 |
Impairments net of the relevant tax effects |  |  |  |  |  |  |  |
Exploration & Production |  |  | (545 | ) |  |  | (524 | )
Gas & Power |  |  | (44 | ) |  |  | (132 | )
Refining & Marketing and Chemical |  |  | (96 | ) |  |  | (88 | )
Corporate and other activities |  |  | (19 | ) |  |  | (40 | )
|  |  | (704 | ) |  |  | (784 | )
A breakdown by segment of reversals of tangible assets recorded and the associated tax effect is provided below:
(€ million) |  | 2017 |  | 2016
Reversals |  |  |  |  |  |  |  |
Exploration & Production |  |  | 776 |  |  |  | 1,055 |
Gas & Power |  |  | 202 |  |  |  | 86 |
Refining & Marketing and Chemical |  |  | 77 |  |  |  | 12 |
|  |  | 1,055 |  |  |  | 1,153 |
Tax effects |  |  |  |  |  |  |  |
Exploration & Production |  |  | (171 | ) |  |  | (315 | )
Gas & Power |  |  | (5 | ) |  |  | (28 | )
Refining & Marketing and Chemical |  |  | (24 | ) |  |  | (3 | )
|  |  | (200 | ) |  |  | (346 | )
Reversals net of the relevant tax effects |  |  |  |  |  |  |  |
Exploration & Production |  |  | 605 |  |  |  | 740 |
Gas & Power |  |  | 197 |  |  |  | 58 |
Refining & Marketing and Chemical |  |  | 53 |  |  |  | 9 |
|  |  | 855 |  |  |  | 807 |
Disclosure of goodwill [text block] | A breakdown of the stated goodwill by operating segment is provided below:
(€ million) |  | December 31, 2017 |  | December 31, 2016
Gas & Power |  |  | 932 |  |  |  | 1,025 |
Exploration & Production |  |  | 179 |  |  |  | 202 |
Refining & Marketing |  |  | 93 |  |  |  | 93 |
|  |  | 1,204 |  |  |  | 1,320 |
Gas & Power Segment [Member] |
StatementsLineItems [Line Items] |
Disclosure of goodwill [text block] | The amount of goodwill outstanding at the reporting date mainly related to the Gas & Power segment. A breakdown is disclosed below.
(€ million) |  | December 31, 2017 |  | December 31, 2016
Domestic gas market |  |  | 835 |  |  |  | 835 |
Foreign gas market |  |  | 97 |  |  |  | 190 |
- of which European market |  |  | 95 |  |  |  | 188 |
|  |  | 932 |  |  |  | 1,025 |

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