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Investments In and Advances To Affiliates (Details) $ in Millions |  |  |  | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Sep. 24, 2015 USD ($) MW | Jul. 02, 2014 USD ($) | Apr. 11, 2014 USD ($) | Sep. 30, 2015 USD ($) | Sep. 30, 2014 USD ($) | Sep. 30, 2015 USD ($) | Sep. 30, 2014 USD ($) | Dec. 31, 2014 USD ($)
Investments in and Advances to Affiliates [Line Items] |  |  |  |  |  |  |  |  |
Operating margin |  |  |  |  | $ 673 | $ 767 | $ 2,148 | $ 2,380 |
Net income |  |  |  |  | 203 | 508 | 721 | 849 |
Acquisitions, net of cash acquired |  |  |  |  |  |  | 17 | 728 |
Proceeds from Interests in Affiliate |  |  |  |  |  |  | 96 | 1,668 |
accumulated other comprehensive income reclassed to other noncurrent assets | [1] |  |  |  | 0 | 40 | 0 | 40 |
Income (Loss) from Equity Method Investments |  |  |  |  | 82 | (6) | 97 | 39 |
Stockholders' Equity Attributable to Parent |  |  |  |  | 3,567 |  | 3,567 |  | $ 4,272
Minority Owned Affiliates [Member] |  |  |  |  |  |  |  |  |
Investments in and Advances to Affiliates [Line Items] |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  | 496 | 716 |
Operating margin |  |  |  |  |  |  | 118 | 159 |
Net income |  |  |  |  |  |  | 193 | 89 |
guacolda [Member] |  |  |  |  |  |  |  |  |
Investments in and Advances to Affiliates [Line Items] |  |  |  |  |  |  |  |  |
Acquisitions, net of cash acquired |  |  |  | $ 728 |  |  |  |  |
Proceeds from Interests in Affiliate |  |  |  | $ 730 |  |  |  |  |
Silver Ridge Power [Member] |  |  |  |  |  |  |  |  |
Investments in and Advances to Affiliates [Line Items] |  |  |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  | 50.00% |  |  |  |  |  |
Equity Method Investment, Purchase Price Agreement |  |  | $ 179 |  |  |  |  |  |
Silver Ridge - Italy [Member] |  |  |  |  |  |  |  |  |
Investments in and Advances to Affiliates [Line Items] |  |  |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  | 50.00% |  |  |  |  |  |
Equity Method Investment, Purchase Price Agreement |  |  | $ 42 |  |  |  |  |  |
Solar Spain [Member] |  |  |  |  |  |  |  |  |
Investments in and Advances to Affiliates [Line Items] |  |  |  |  |  |  |  |  |
Generation Capacity Mega Watts | MW |  | 31 |  |  |  |  |  |  |
Equity Method Investment, Net Sales Proceeds |  | $ 31 |  |  |  |  |  |  |
Equity Method Investment, Realized Gain (Loss) on Disposal- (Less Than) |  | $ 1 |  |  |  |  |  |  |
guacolda [Member] |  |  |  |  |  |  |  |  |
Investments in and Advances to Affiliates [Line Items] |  |  |  |  |  |  |  |  |
Income (Loss) from Equity Method Investments |  |  |  |  | 66 |  | 66 |  |
Parent [Member] |  |  |  |  |  |  |  |  |
Investments in and Advances to Affiliates [Line Items] |  |  |  |  |  |  |  |  |
Net income |  |  |  |  |  |  | 391 | 563 |
accumulated other comprehensive income reclassed to other noncurrent assets | [1] |  |  |  | 0 | $ 40 | 0 | $ 40 |
Parent [Member] | guacolda [Member] |  |  |  |  |  |  |  |  |
Investments in and Advances to Affiliates [Line Items] |  |  |  |  |  |  |  |  |
Income (Loss) from Equity Method Investments |  |  |  |  | $ 46 |  | $ 46 |  |
[1] | (1) Reclassification resulting from SRP transaction during the third quarter of 2014. See Note 7—Investments In and Advances to Affiliates for further information.

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