Separation and Merger Transaction (Net sales and earnings from discontinued operations) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Jun. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal group, including discontinued operations, Net Assets attributable to parent					$ 256
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	6	54	2,197	189
Disposal Group, Including Discontinued Operation, Accounts Payable					(100)
Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, before Income Tax	0
Net Income (Loss) Attributable to Noncontrolling Interest	29	25	94	97
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	6	51	2,197	179
Disposal Group, Including Discontinued Operation, Accounts, Notes and Loans Receivable, Net					245
Commodity Chemicals Segment [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	6	54	2,197	189
Disposal Group, Including Discontinued Operation, Revenue	0	437	108	1,283
Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, before Income Tax		84	0	283
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax	0	0	2,192	0
Discontinued Operation, Tax Effect of Discontinued Operation	6	(30)	5	(94)
Net Income (Loss) Attributable to Noncontrolling Interest		3	0	10
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	$ 6	$ 51	$ 2,197	$ 179