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Information by industry segment and by geographical area (Details) - EUR (€) € in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
DisclosureOfEntitysReportableSegmentsExplanatoryLineItems [Line Items] |  |  |  |  |
Net sales to customers |  | € 66,919 | € 55,762 | € 72,286 |
Operating profit |  | 8,012 | 2,157 | (3,076) |
Net provisions for contingencies |  | 886 | 505 | 644 |
Depreciation and amortization |  | 7,483 | 7,559 | 8,940 |
Net (impairments) reversals |  | (225) | (475) | 6,534 |
Write-off |  | 263 | 350 | 688 |
Share of profit (loss) of equity-accounted investments |  | (267) | (326) | (471) |
Identifiable assets | [1] | 89,816 | 99,068 | 112,028 | [2]
Equity-accounted investments |  | 3,511 | 4,040 | 2,853 |
Capital expenditure |  | 8,681 | 9,180 | 11,302 |
Elimination of intragroup profits [Member] |  |  |  |  |
DisclosureOfEntitysReportableSegmentsExplanatoryLineItems [Line Items] |  |  |  |  |
Operating profit |  |  |  | 1,228 |
Continuing and discontinued operation [member] |  |  |  |  |
DisclosureOfEntitysReportableSegmentsExplanatoryLineItems [Line Items] |  |  |  |  |
Net sales to customers |  | 66,919 | 55,762 | 82,550 |
Operating profit |  | 8,012 | 2,157 | (4,998) |
Net provisions for contingencies |  | 886 | 505 | 748 |
Depreciation and amortization |  | 7,483 | 7,559 | 9,558 |
Net (impairments) reversals |  | (225) | (475) | 7,124 |
Write-off |  | 263 | 350 | 688 |
Share of profit (loss) of equity-accounted investments |  | (267) | (326) | (454) |
Identifiable assets | [2] | 89,816 | 99,068 | 112,028 |
Unallocated assets |  | 25,112 | 25,477 | 26,973 |
Equity-accounted investments |  | 3,511 | 4,040 | 2,987 |
Identifiable liabilities | [3] | 33,876 | 33,931 | 40,198 |
Unallocated liabilities |  | 32,973 | 37,528 | 41,394 |
Capital expenditure |  | 8,681 | 9,180 | 11,302 |
Continuing and discontinued operation [member] | Exploration & Production Segment [Member] |  |  |  |  |
DisclosureOfEntitysReportableSegmentsExplanatoryLineItems [Line Items] |  |  |  |  |
Net sales from operations | [4] | 19,525 | 16,089 | 21,436 |
Less: intersegment sales |  | (12,394) | (9,711) | (12,115) |
Net sales to customers |  | 7,131 | 6,378 | 9,321 |
Operating profit |  | 7,651 | 2,567 | (959) |
Net provisions for contingencies |  | 479 | 123 | 221 |
Depreciation and amortization |  | 6,747 | 6,772 | 8,080 |
Net (impairments) reversals |  | (158) | (700) | 5,212 |
Write-off |  | 260 | 153 | 686 |
Share of profit (loss) of equity-accounted investments |  | (99) | (198) | (446) |
Identifiable assets | [2] | 66,661 | 75,716 | 73,073 |
Equity-accounted investments |  | 1,234 | 1,626 | 1,884 |
Identifiable liabilities | [3] | 17,273 | 17,433 | 17,742 |
Capital expenditure |  | 7,739 | 8,254 | 9,980 |
Continuing and discontinued operation [member] | Gas & Power segment [Member] |  |  |  |  |
DisclosureOfEntitysReportableSegmentsExplanatoryLineItems [Line Items] |  |  |  |  |
Net sales from operations | [4] | 50,623 | 40,961 | 52,096 |
Less: intersegment sales |  | (10,777) | (8,898) | (9,917) |
Net sales to customers |  | 39,846 | 32,063 | 42,179 |
Operating profit |  | 75 | (391) | (1,258) |
Net provisions for contingencies |  | (20) | 50 | 41 |
Depreciation and amortization |  | 345 | 354 | 363 |
Net (impairments) reversals |  | (146) | 81 | 152 |
Write-off |  | 2 | 2 | 2 |
Share of profit (loss) of equity-accounted investments |  | (10) | 19 | (2) |
Identifiable assets | [2] | 11,058 | 12,014 | 14,290 |
Equity-accounted investments |  | 509 | 592 | 690 |
Identifiable liabilities | [3] | 8,851 | 8,923 | 9,313 |
Capital expenditure |  | 142 | 120 | 154 |
Continuing and discontinued operation [member] | Refining & Marketing and Chemical segment [Member] |  |  |  |  |
DisclosureOfEntitysReportableSegmentsExplanatoryLineItems [Line Items] |  |  |  |  |
Net sales from operations | [4] | 22,107 | 18,733 | 22,639 |
Less: intersegment sales |  | (2,336) | (1,605) | (2,007) |
Net sales to customers |  | 19,771 | 17,128 | 20,632 |
Operating profit |  | 981 | 723 | (1,567) |
Net provisions for contingencies |  | 182 | 171 | 148 |
Depreciation and amortization |  | 360 | 389 | 454 |
Net (impairments) reversals |  | 54 | 104 | 1,150 |
Write-off |  | 1 | 195 |  |
Share of profit (loss) of equity-accounted investments |  | (57) | (3) | (20) |
Identifiable assets | [2] | 11,599 | 10,712 | 10,483 |
Equity-accounted investments |  | 321 | 289 | 243 |
Identifiable liabilities | [3] | 4,005 | 3,968 | 3,657 |
Capital expenditure |  | 729 | 664 | 628 |
Continuing and discontinued operation [member] | Engineering & Construction [Member] |  |  |  |  |
DisclosureOfEntitysReportableSegmentsExplanatoryLineItems [Line Items] |  |  |  |  |
Net sales from operations | [4] |  |  | 11,507 |
Less: intersegment sales |  |  |  | (1,243) |
Net sales to customers |  |  |  | 10,264 |
Operating profit |  |  |  | (694) |
Net provisions for contingencies |  |  |  | 104 |
Depreciation and amortization |  |  |  | 618 |
Net (impairments) reversals |  |  |  | 590 |
Share of profit (loss) of equity-accounted investments |  |  |  | 17 |
Identifiable assets | [2] |  |  | 13,608 |
Equity-accounted investments |  |  |  | 134 |
Identifiable liabilities | [3] |  |  | 5,861 |
Capital expenditure |  |  |  | 561 |
Continuing and discontinued operation [member] | Corporate And Other Activities [Member] |  |  |  |  |
DisclosureOfEntitysReportableSegmentsExplanatoryLineItems [Line Items] |  |  |  |  |
Net sales from operations | [4] | 1,462 | 1,343 | 1,468 |
Less: intersegment sales |  | (1,291) | (1,150) | (1,314) |
Net sales to customers |  | 171 | 193 | 154 |
Operating profit |  | (668) | (681) | (497) |
Net provisions for contingencies |  | 245 | 438 | 226 |
Depreciation and amortization |  | 60 | 72 | 71 |
Net (impairments) reversals |  | 25 | 40 | 20 |
Share of profit (loss) of equity-accounted investments |  | (101) | (144) | (3) |
Identifiable assets | [2] | 1,108 | 1,146 | 1,117 |
Equity-accounted investments |  | 1,447 | 1,533 | 36 |
Identifiable liabilities | [3] | 4,053 | 3,939 | 3,824 |
Capital expenditure |  | 87 | 55 | 64 |
Continuing and discontinued operation [member] | Adjustments of intragroup profits [Member] |  |  |  |  |
DisclosureOfEntitysReportableSegmentsExplanatoryLineItems [Line Items] |  |  |  |  |
Operating profit |  | (27) | (61) | (23) |
Net provisions for contingencies |  |  | (277) | 8 |
Depreciation and amortization |  | (29) | (28) | (28) |
Identifiable assets | [2] | (610) | (520) | (543) |
Identifiable liabilities | [3] | (306) | (332) | (199) |
Capital expenditure |  | € (16) | € 87 | (85) |
Discontinued operations [member] | Engineering & Construction [Member] |  |  |  |  |
DisclosureOfEntitysReportableSegmentsExplanatoryLineItems [Line Items] |  |  |  |  |
Net sales to customers |  |  |  | (10,264) |
Operating profit |  |  |  | 694 |
Net provisions for contingencies |  |  |  | (104) |
Depreciation and amortization |  |  |  | (618) |
Net (impairments) reversals |  |  |  | (590) |
Share of profit (loss) of equity-accounted investments |  |  |  | (17) |
Equity-accounted investments |  |  |  | € (134) |
[1] | Each individual amount included herein was lower than &euro;50 million.
[2] | Includes assets directly associated with the generation of operating profit.
[3] | Includes liabilities directly associated with the generation of operating profit.
[4] | Before elimination of intersegment sales.

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