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