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Investments In and Advances To Affiliates | 12 Months Ended
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Dec. 31, 2017
Equity Method Investments and Joint Ventures [Abstract] |
INVESTMENTS IN AND ADVANCES TO AFFILIATES | INVESTMENTS IN AND ADVANCES TO AFFILIATES The following table summarizes the relevant effective equity ownership interest and carrying values for the Company's investments accounted for under the equity method as of the periods indicated:
December 31, |  |  | 2017 |  | 2016 |  | 2017 |  | 2016
Affiliate | Country |  | Carrying Value (in millions) |  | Ownership Interest %
sPower | United States |  | $ | 508 |  |  | $ | — |  |  | 50 | % |  | — | %
Guacolda (1) | Chile |  | 357 |  |  | 362 |  |  | 33 | % |  | 33 | %
OPGC (2) | India |  | 269 |  |  | 195 |  |  | 49 | % |  | 49 | %
Elsta (3) | Netherlands |  | 38 |  |  | 41 |  |  | 50 | % |  | 50 | %
Equity method investments of Distributed Energy (3) | United States |  | 15 |  |  | 22 |  |  | 95 | % |  | 95 | %
Barry (3) | United Kingdom |  | — |  |  | — |  |  | 100 | % |  | 100 | %
Other affiliates | Various |  | 10 |  |  | 1 |  |  |  |  |
Total |  |  | $ | 1,197 |  |  | $ | 621 |  |  |  |  |
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(1) | The Company's ownership in Guacolda is held through AES Gener, a 67%-owned consolidated subsidiary. AES Gener owns 50% of Guacolda, resulting in an AES effective ownership in Guacolda of 33%.
(2) | OPGC has one coal-fired project under development which is an expansion of our existing OPGC business. The project started construction in April 2014 and is expected to begin operations in 2019.
(3) | Represent VIEs in which the Company holds a variable interest, but is not the primary beneficiary.
sPower — In February 2017, the Company and Alberta Investment Management Corporation (“AIMCo”) entered into an agreement to acquire FTP Power LLC (“sPower”). In July 2017, AES closed on the acquisition of its 48% ownership interest in sPower for $461 million. In November 2017, AES acquired an additional 2% ownership interest in sPower for $19 million. As the Company does not control sPower, it is accounted for as an equity method investment. The sPower portfolio includes solar and wind projects in operation, under construction, and in development located in the United States. The sPower equity method investment is reported in the US SBU reportable segment. Guacolda — In September 2015, AES Gener and Global Infrastructure Partners ("GIP") executed a restructuring of Guacolda that increased Guacolda's tax basis in certain long-term assets and AES Gener's equity investment. As a result, AES Gener recorded $66 million in net equity in earnings of affiliates for the year ended December 31, 2015, of which $46 million is attributable to The AES Corporation. AES Barry Ltd. — The Company holds a 100% ownership interest in AES Barry Ltd. ("Barry"), a dormant entity in the U.K. that disposed of its generation and other operating assets. Due to a debt agreement, no material financial or operating decisions can be made without the banks' consent, and the Company does not control Barry. As of December 31, 2017 and 2016, other long-term liabilities included $45 million and $41 million related to this debt agreement. Summarized Financial Information — The following tables summarize financial information of the Company's 50%-or-less-owned affiliates and majority-owned unconsolidated subsidiaries that are accounted for using the equity method (in millions):
| 50%-or-less Owned Affiliates |  | Majority-Owned Unconsolidated Subsidiaries
Years ended December 31, | 2017 |  | 2016 |  | 2015 |  | 2017 |  | 2016 |  | 2015
Revenue | $ | 762 |  |  | $ | 586 |  |  | $ | 641 |  |  | $ | 16 |  |  | $ | 23 |  |  | $ | 24 |
Operating margin | 165 |  |  | 145 |  |  | 152 |  |  | 5 |  |  | 9 |  |  | 11 |
Net income (loss) | 72 |  |  | 64 |  |  | 210 |  |  | (15 | ) |  | (2 | ) |  | 6 |
December 31, | 2017 |  | 2016 |  |  |  | 2017 |  | 2016 |  |
Current assets | $ | 418 |  |  | $ | 308 |  |  |  |  | $ | 70 |  |  | $ | 16 |  |  |
Noncurrent assets | 5,372 |  |  | 2,577 |  |  |  |  | 102 |  |  | 181 |  |  |
Current liabilities | 633 |  |  | 626 |  |  |  |  | 10 |  |  | 10 |  |  |
Noncurrent liabilities | 2,629 |  |  | 1,209 |  |  |  |  | 147 |  |  | 122 |  |  |
Stockholders' equity | 2,527 |  |  | 1,048 |  |  |  |  | 15 |  |  | 65 |  |  |
At December 31, 2017, retained earnings included $254 million related to the undistributed earnings of the Company's 50%-or-less owned affiliates. Distributions received from these affiliates were $69 million, $24 million, and $18 million for the years ended December 31, 2017, 2016, and 2015, respectively. As of December 31, 2017, the aggregate carrying amount of our investments in equity affiliates exceeded the underlying equity in their net assets by $46 million.

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- Definition The entire disclosure for the information summarizing investments in and advances to majority-owned subsidiaries, other controlled companies, and other affiliates. It reflects specified information about ownership, financial results from, and financial position in such entities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2324412 + Details
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