Divestitures and Other Transactions (Schedule of results of operations from discontinued operations) (Performance Chemicals) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income from discontinued operations after income taxes	$ 64	$ 491	$ 2,656
Performance Chemicals [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales	2,810	6,317	6,736
Costs of goods sold	2,215	4,680	4,905
Other operating charges	386	422	338
Selling, general and administrative expenses	(87)	453	491
Research and development expense	40	109	116
Other income, net	(27)	(46)	(39)
Interest expense	32	0	0
Employee separation / asset related charges, net	59	21	2
Income from discontinued operations before income taxes	192	678	923
Provision for income taxes	106	202	266
Income from discontinued operations after income taxes	$ 86	$ 476	$ 657