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Equity Method Investments And Variable Interest Entities Equity Method Investments and Variable Interest Entities (Schedule of Equity in Earnings of Unconsolidated Affiliates) (Details) - USD ($) $ in Millions | Jun. 30, 2015 | Dec. 31, 2014 | Dec. 31, 2013
--- | --- | --- | ---
Beginning Balance [Member] |  |  |
Equity In Earnings of Unconsolidated Affiliates [Line Items] |  |  |
Equity Method Investments |  | $ 151 | $ 156
Joint Venture Earnings [Member] |  |  |
Equity In Earnings of Unconsolidated Affiliates [Line Items] |  |  |
Equity Method Investments | $ 88 | 163 |
Dividends Paid by Joint Venture [Member] |  |  |
Equity In Earnings of Unconsolidated Affiliates [Line Items] |  |  |
Equity Method Investments | (72) | (249) |
Advances [Member] |  |  |
Equity In Earnings of Unconsolidated Affiliates [Line Items] |  |  |
Equity Method Investments | (4) | (13) |
Cumulative Translation Adjustment [Member] |  |  |
Equity In Earnings of Unconsolidated Affiliates [Line Items] |  |  |
Equity Method Investments | (4) | (1) |
Other Activity [Member] |  |  |
Equity In Earnings of Unconsolidated Affiliates [Line Items] |  |  |
Equity Method Investments | 1 | 0 |
Subtotal Before Reclassification [Member] |  |  |
Equity In Earnings of Unconsolidated Affiliates [Line Items] |  |  |
Equity Method Investments | 160 | 56 |
Ending Balance [Member] |  |  |
Equity In Earnings of Unconsolidated Affiliates [Line Items] |  |  |
Equity Method Investments | 165 | 151 |
Reclassification of excess distribution [Member] |  |  |
Equity In Earnings of Unconsolidated Affiliates [Line Items] |  |  |
Equity Method Investments | 9 | 102 |
Recognition of Excess Distribution [Member] |  |  |
Equity In Earnings of Unconsolidated Affiliates [Line Items] |  |  |
Equity Method Investments | $ (4) | $ (7) |

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- Definition This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35755396&loc=d3e33749-111570 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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