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Investments - Net carrying amount (Details) - EUR (€) € in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Investments |  |  |
Net carrying amount | € 9,035 | € 7,044 | € 3,511
Individual amount limit to be included in other equity-accounted investments | 25 |  |
Associates |  |  |
Investments |  |  |
Net carrying amount | 4,357 | 1,452 |
Associates | Abu Dhabi Oil Refining Co |  |  |
Investments |  |  |
Net carrying amount | € 2,829 |  |
% of the investment | 20.00% |  |
Associates | Angola LNG Ltd |  |  |
Investments |  |  |
Net carrying amount | € 1,159 | € 1,106 |
% of the investment | 13.60% | 13.60% |
Associates | Coral FLNG SA |  |  |
Investments |  |  |
Net carrying amount | € 102 | € 102 |
% of the investment | 25.00% | 25.00% |
Associates | Novamont SpA |  |  |
Investments |  |  |
Net carrying amount | € 71 | € 67 |
% of the investment | 25.00% | 25.00% |
Associates | United Gas Derivatives Co |  |  |
Investments |  |  |
Net carrying amount | € 69 | € 62 |
% of the investment | 33.33% | 33.33% |
Associates | Commonwealth Fusion Systems Llc |  |  |
Investments |  |  |
Net carrying amount | € 37 | € 42 |
Associates | Other investments |  |  |
Investments |  |  |
Net carrying amount | 90 | 73 |
Joint ventures |  |  |
Investments |  |  |
Net carrying amount | 4,592 | 5,497 |
Joint ventures | Var Energi AS |  |  |
Investments |  |  |
Net carrying amount | € 2,518 | € 3,498 |
% of the investment | 69.60% | 69.60% |
Joint ventures | Saipem SpA |  |  |
Investments |  |  |
Net carrying amount | € 1,250 | € 1,228 |
% of the investment | 30.99% | 30.99% |
Joint ventures | Union Fenosa Gas SA |  |  |
Investments |  |  |
Net carrying amount | € 326 | € 335 |
% of the investment | 50.00% | 50.00% |
Joint ventures | Cardon IV SA |  |  |
Investments |  |  |
Net carrying amount | € 148 | € 98 |
% of the investment | 50.00% | 50.00% |
Joint ventures | Gas Distribution Company of Thessaloniki Thessaly SA |  |  |
Investments |  |  |
Net carrying amount | € 139 | € 137 |
% of the investment | 49.00% | 49.00% |
Joint ventures | Lotte Versalis Elastomers Co Ltd |  |  |
Investments |  |  |
Net carrying amount | € 74 | € 75 |
% of the investment | 50.00% | 50.00% |
Joint ventures | Petro Junin SA |  |  |
Investments |  |  |
Net carrying amount | € 53 | € 47 |
% of the investment | 40.00% | 40.00% |
Joint ventures | AET Raffineriebeteiligungs gesellschaft mbH |  |  |
Investments |  |  |
Net carrying amount | € 35 | € 32 |
% of the investment | 33.33% | 33.33% |
Joint ventures | Other investments |  |  |
Investments |  |  |
Net carrying amount | € 49 | € 47 |
Investments in unconsolidated entities controlled by Eni |  |  |
Investments |  |  |
Net carrying amount | 86 | 95 |
Investments in unconsolidated entities controlled by Eni | Eni BTC Ltd |  |  |
Investments |  |  |
Net carrying amount | € 30 | € 31 |
% of the investment | 100.00% | 100.00% |
Investments in unconsolidated entities controlled by Eni | Other investments |  |  |
Investments |  |  |
Net carrying amount | € 56 | € 64 |

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- Definition The amount of investments accounted for using the equity method. The equity method is a method of accounting whereby the investment is initially recognised at cost and adjusted thereafter for the post-acquisition change in the investor's share of net assets of the investee. The investor's profit or loss includes its share of the profit or loss of the investee. The investor's other comprehensive income includes its share of the other comprehensive income of the investee. [Refer: At cost [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2019-01-01 -Paragraph 24 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2019-en-r&anchor=para_24_a&doctype=Standard -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2019-01-01 -Paragraph B16 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2019-en-r&anchor=para_B16&doctype=Appendix&subtype=B -URIDate 2019-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 54 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_54_e&doctype=Standard -URIDate 2019-03-27 + Details
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