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Segment information and information by geographical area | 12 Months Ended
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Dec. 31, 2018
Disclosure of Segmental Analysis [Abstract] |
Disclosure of entity's operating segments [text block] | 35 Segment information and information by geographical area Segment information Eni’s segmental reporting reflects the Group’s operating segments, whose results are regularly reviewed by the chief operating decision maker (the CEO) to make decisions about resources to be allocated to each segment and to assess segment performance. Segment performance is evaluated based on operating profit or loss. Other segment information presented to the CEO include segment revenues and directly attributable assets and liabilities. As of December 31, 2018, Eni had the following reportable segments:
| • | Exploration & Production: engages in the exploration, development and production of crude oil, LNG and natural gas, including projects to build and operate liquefaction plants of natural gas;
| • | Gas & Power: engages in supply and marketing of natural gas at wholesale and retail markets, supply and marketing of LNG and supply, production and marketing of power at retail and wholesale markets. Gas & Power is engaged in supply and marketing of crude oil and oil products targeting the operational requirements of Eni’s refining business and in commodity trading (including crude oil, natural gas, oil products, power, emission allowances, etc.) targeting to both hedge and stabilize the Group industrial and commercial margins according to an integrated view and to optimize margins.
| • | Refining & Marketing and Chemical: engages in the manufacturing, supply and distribution and marketing activities of oil products and chemical products. The results of the Chemicals business have been aggregated to those of the Refining & Marketing business in a single reportable segment, because these two operating segments exhibit similar economic characteristics.
| • | Corporate and other activities: include the costs of the Group HQ functions which provide services to the operating subsidiaries, comprising holding, financing and treasury, IT, HR, real estate, legal assistance, captive insurance, planning and administration activities, as well as the results of the Group environmental cleanup and remediation activities performed by the subsidiary Syndial. The Energy Solutions Department, which engages in developing the business of renewable energy, is an operating segment, which is reported within Corporate and other activities because it does not meet the materiality threshold for separate segment reporting.
Information by segment is as follows:
(€ million) |  | Exploration & Production |  | Gas & Power |  | Refining & Marketing and Chemical |  | Corporate and other activities |  | Adjustments of intragroup profits |  | Total
2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales from operations(a) |  |  | 25,744 |  |  |  | 55,690 |  |  |  | 25,216 |  |  |  | 1,589 |  |  |  |  |  |  |  |  |
Less: intersegment sales |  |  | (15,801 | ) |  |  | (12,581 | ) |  |  | (2,622 | ) |  |  | (1,413 | ) |  |  |  |  |  |  |  |
Net sales to customers |  |  | 9,943 |  |  |  | 43,109 |  |  |  | 22,594 |  |  |  | 176 |  |  |  |  |  |  |  | 75,822 |
Operating profit |  |  | 10,214 |  |  |  | 629 |  |  |  | (380 | ) |  |  | (691 | ) |  |  | 211 |  |  |  | 9,983 |
Net provisions for contingencies |  |  | 235 |  |  |  | 53 |  |  |  | 274 |  |  |  | 579 |  |  |  | (21 | ) |  |  | 1,120 |
Depreciation and amortization |  |  | 6,152 |  |  |  | 408 |  |  |  | 399 |  |  |  | 59 |  |  |  | (30 | ) |  |  | 6,988 |
Impairments of tangible and intangible assets |  |  | 1,025 |  |  |  | 56 |  |  |  | 193 |  |  |  | 18 |  |  |  |  |  |  |  | 1,292 |
Reversals of tangible and intangible assets |  |  | 299 |  |  |  | 127 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 426 |
Write-off |  |  | 97 |  |  |  | 1 |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  | 100 |
Share of profit (loss) of equity-accounted investments |  |  | 158 |  |  |  | 9 |  |  |  | (67 | ) |  |  | (168 | ) |  |  |  |  |  |  | (68 | )
Identifiable assets(b) |  |  | 63,051 |  |  |  | 9,989 |  |  |  | 11,692 |  |  |  | 1,171 |  |  |  | (420 | ) |  |  | 85,483 |
Unallocated assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 32,890 |
Equity-accounted investments |  |  | 4,972 |  |  |  | 494 |  |  |  | 275 |  |  |  | 1,303 |  |  |  |  |  |  |  | 7,044 |
Identifiable liabilities(c) |  |  | 18,110 |  |  |  | 8,314 |  |  |  | 4,319 |  |  |  | 4,072 |  |  |  | (275 | ) |  |  | 34,540 |
Unallocated liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 32,760 |
Capital expenditure in tangible and intangible assets |  |  | 7,901 |  |  |  | 215 |  |  |  | 877 |  |  |  | 143 |  |  |  | (17 | ) |  |  | 9,119 |
2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales from operations(a) |  |  | 19,525 |  |  |  | 50,623 |  |  |  | 22,107 |  |  |  | 1,462 |  |  |  |  |  |  |  |  |
Less: intersegment sales |  |  | (12,394 | ) |  |  | (10,777 | ) |  |  | (2,336 | ) |  |  | (1,291 | ) |  |  |  |  |  |  |  |
Net sales to customers |  |  | 7,131 |  |  |  | 39,846 |  |  |  | 19,771 |  |  |  | 171 |  |  |  |  |  |  |  | 66,919 |
Operating profit |  |  | 7,651 |  |  |  | 75 |  |  |  | 981 |  |  |  | (668 | ) |  |  | (27 | ) |  |  | 8,012 |
Net provisions for contingencies |  |  | 479 |  |  |  | (20 | ) |  |  | 182 |  |  |  | 245 |  |  |  |  |  |  |  | 886 |
Depreciation and amortization |  |  | 6,747 |  |  |  | 345 |  |  |  | 360 |  |  |  | 60 |  |  |  | (29 | ) |  |  | 7,483 |
Impairments of tangible and intangible assets |  |  | 650 |  |  |  | 56 |  |  |  | 131 |  |  |  | 25 |  |  |  |  |  |  |  | 862 |
Reversals of tangible and intangible assets |  |  | 808 |  |  |  | 202 |  |  |  | 77 |  |  |  |  |  |  |  |  |  |  |  | 1,087 |
Write-off |  |  | 260 |  |  |  | 2 |  |  |  | 1 |  |  |  |  |  |  |  |  |  |  |  | 263 |
Share of profit (loss) of equity-accounted investments |  |  | (99 | ) |  |  | (10 | ) |  |  | (57 | ) |  |  | (101 | ) |  |  |  |  |  |  | (267 | )
Identifiable assets(b) |  |  | 66,661 |  |  |  | 11,058 |  |  |  | 11,599 |  |  |  | 1,108 |  |  |  | (610 | ) |  |  | 89,816 |
Unallocated assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 25,112 |
Equity-accounted investments |  |  | 1,234 |  |  |  | 509 |  |  |  | 321 |  |  |  | 1,447 |  |  |  |  |  |  |  | 3,511 |
Identifiable liabilities(c) |  |  | 17,273 |  |  |  | 8,851 |  |  |  | 4,005 |  |  |  | 4,053 |  |  |  | (306 | ) |  |  | 33,876 |
Unallocated liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 32,973 |
Capital expenditure in tangible and intangible assets |  |  | 7,739 |  |  |  | 142 |  |  |  | 729 |  |  |  | 87 |  |  |  | (16 | ) |  |  | 8,681 |
2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales from operations(a) |  |  | 16,089 |  |  |  | 40,961 |  |  |  | 18,733 |  |  |  | 1,343 |  |  |  |  |  |  |  |  |
Less: intersegment sales |  |  | (9,711 | ) |  |  | (8,898 | ) |  |  | (1,605 | ) |  |  | (1,150 | ) |  |  |  |  |  |  |  |
Net sales to customers |  |  | 6,378 |  |  |  | 32,063 |  |  |  | 17,128 |  |  |  | 193 |  |  |  |  |  |  |  | 55,762 |
Operating profit |  |  | 2,567 |  |  |  | (391 | ) |  |  | 723 |  |  |  | (681 | ) |  |  | (61 | ) |  |  | 2,157 |
Net provisions for contingencies |  |  | 123 |  |  |  | 50 |  |  |  | 171 |  |  |  | 438 |  |  |  | (277 | ) |  |  | 505 |
Depreciation and amortization |  |  | 6,772 |  |  |  | 354 |  |  |  | 389 |  |  |  | 72 |  |  |  | (28 | ) |  |  | 7,559 |
Impairments of tangible and intangible assets |  |  | 740 |  |  |  | 167 |  |  |  | 120 |  |  |  | 40 |  |  |  |  |  |  |  | 1,067 |
Reversals of tangible and intangible assets |  |  | 1,440 |  |  |  | 86 |  |  |  | 16 |  |  |  |  |  |  |  |  |  |  |  | 1,542 |
Write-off |  |  | 153 |  |  |  | 2 |  |  |  | 195 |  |  |  |  |  |  |  |  |  |  |  | 350 |
Share of profit (loss) of equity-accounted investments |  |  | (198 | ) |  |  | 19 |  |  |  | (3 | ) |  |  | (144 | ) |  |  |  |  |  |  | (326 | )
Identifiable assets(b) |  |  | 75,716 |  |  |  | 12,014 |  |  |  | 10,712 |  |  |  | 1,146 |  |  |  | (520 | ) |  |  | 99,068 |
Unallocated assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 25,477 |
Equity-accounted investments |  |  | 1,626 |  |  |  | 592 |  |  |  | 289 |  |  |  | 1,533 |  |  |  |  |  |  |  | 4,040 |
Identifiable liabilities(c) |  |  | 17,433 |  |  |  | 8,923 |  |  |  | 3,968 |  |  |  | 3,939 |  |  |  | (332 | ) |  |  | 33,931 |
Unallocated liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 37,528 |
Capital expenditure in tangible and intangible assets |  |  | 8,254 |  |  |  | 120 |  |  |  | 664 |  |  |  | 55 |  |  |  | 87 |  |  |  | 9,180 |
(a) Before elimination of intersegment sales. (b) Includes assets directly associated with the generation of operating profit. (c) Includes liabilities directly associated with the generation of operating profit. Financial information by geographical area Identifiable assets and investments by geographical area of origin
(€ million) |  | Italy |  | Other European Union |  | Rest of Europe |  | Americas |  | Asia |  | Africa |  | Other areas |  | Total
2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Identifiable assets(a) |  |  | 18,646 |  |  |  | 7,086 |  |  |  | 1,031 |  |  |  | 4,546 |  |  |  | 16,910 |  |  |  | 36,155 |  |  |  | 1,109 |  |  |  | 85,483 |
Capital expenditure in tangible and intangible assets |  |  | 1,424 |  |  |  | 267 |  |  |  | 538 |  |  |  | 534 |  |  |  | 1,782 |  |  |  | 4,533 |  |  |  | 41 |  |  |  | 9,119 |
2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Identifiable assets(a) |  |  | 18,449 |  |  |  | 7,706 |  |  |  | 6,160 |  |  |  | 4,406 |  |  |  | 16,527 |  |  |  | 35,385 |  |  |  | 1,183 |  |  |  | 89,816 |
Capital expenditure in tangible and intangible assets |  |  | 1,090 |  |  |  | 316 |  |  |  | 387 |  |  |  | 278 |  |  |  | 898 |  |  |  | 5,699 |  |  |  | 13 |  |  |  | 8,681 |
2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Identifiable assets(a) |  |  | 18,769 |  |  |  | 7,370 |  |  |  | 6,960 |  |  |  | 5,397 |  |  |  | 19,471 |  |  |  | 39,812 |  |  |  | 1,289 |  |  |  | 99,068 |
Capital expenditure in tangible and intangible assets |  |  | 1,163 |  |  |  | 331 |  |  |  | 460 |  |  |  | 233 |  |  |  | 1,978 |  |  |  | 5,004 |  |  |  | 11 |  |  |  | 9,180 |
(a) Includes assets directly associated with the generation of operating profit. Net sales from operations by geographical area of destination
(€ million) |  | 2018 |  | 2017 |  | 2016
Italy |  |  | 25,279 |  |  |  | 21,925 |  |  |  | 21,280 |
Other European Union |  |  | 20,408 |  |  |  | 19,791 |  |  |  | 15,808 |
Rest of Europe |  |  | 7,052 |  |  |  | 5,911 |  |  |  | 4,804 |
Americas |  |  | 5,051 |  |  |  | 5,154 |  |  |  | 3,212 |
Asia |  |  | 9,585 |  |  |  | 7,523 |  |  |  | 5,619 |
Africa |  |  | 8,246 |  |  |  | 6,428 |  |  |  | 4,865 |
Other areas |  |  | 201 |  |  |  | 187 |  |  |  | 174 |
|  |  | 75,822 |  |  |  | 66,919 |  |  |  | 55,762 |

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