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Divestitures and Other Transactions (Narrative) (Details) (USD $) In Millions, unless otherwise specified | 9 Months Ended | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Sep. 30, 2014 | Sep. 30, 2014 GLS/Vinyls [Member] | Sep. 30, 2014 Performance Chemicals [Member] | Sep. 30, 2014 Performance Chemicals [Member] | Sep. 30, 2013 Performance Coatings [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Pre-tax gain on sale of business, continuing operations | $ 391 | $ 391 |  |  |
After-tax gain on sale of business, continuing operations |  | 273 |  |  |
Separation related transaction costs |  |  | 61 | 112 |
Pre-tax gain on sale of discontinued operation |  |  |  |  | 2,689
After-tax gain on sale of discontinued operation |  |  |  |  | $ 1,964

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