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Total Other Non-Operating Expense (Details) - USD ($) $ in Millions |  | 12 Months Ended
--- | --- | ---
Jul. 02, 2014 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Schedule of Other Nonoperating Income (Expense) [Line Items] |  |  |  |
Other Nonoperating Expense |  | $ (2) | $ 0 | $ (128)
Entek |  |  |  |
Schedule of Other Nonoperating Income (Expense) [Line Items] |  |  |  |
Investment In Affiliate Ownership Percentage Sold |  |  |  | 49.62%
Equity Method Investment, Purchase Price Agreement |  |  |  | $ 125
Equity Method Investment, Other than Temporary Impairment |  |  |  | 86
Silver Ridge Power |  |  |  |
Schedule of Other Nonoperating Income (Expense) [Line Items] |  |  |  |
Equity Method Investment, Purchase Price Agreement | $ 179 |  |  |
Equity Method Investment, Other than Temporary Impairment |  |  |  | $ 42
Equity Method Investment, Ownership Percentage Sold | 50.00% |  |  |
Equity Method Investment, Net Sales Proceeds | $ 179 |  |  |

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- Definition The effective percentage of the affiliate's voting interest owned by the reporting entity (directly or indirectly) + References No definition available. + Details
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- Definition This item represents an other than temporary decline in value that has been recognized against an investment accounted for under the equity method of accounting. The excess of the carrying amount over the fair value of the investment represents the amount of the write down which is or was reflected in earnings. The written down value is a new cost basis with the adjusted value of the investment becoming its new carrying value subject to the equity accounting method. Evidence of a loss in value might include, but would not necessarily be limited to, absence of an ability to recover the carrying amount of the investment or inability of the investee to sustain an earnings capacity which would justify the carrying amount of the investment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 35 -Paragraph 32 -URI http://asc.fasb.org/extlink&oid=64825282&loc=d3e32787-111569 + Details
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- Definition Amount of expense related to nonoperating activities, classified as other. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.9) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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- Definition The cash inflow associated with the sale of equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3179-108585 + Details
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