Separation and Merger Transaction (Net sales and earnings from discontinued operations) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 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	0	68	2,191	135
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	30	34	65	72
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	0	65	2,191	128
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	0	68	2,191	135
Disposal Group, Including Discontinued Operation, Revenue	0	427	108	846
Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, before Income Tax		101	0	199
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax	0	0	2,192	0
Discontinued Operation, Tax Effect of Discontinued Operation	0	(33)	(1)	(64)
Net Income (Loss) Attributable to Noncontrolling Interest		3	0	7
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	$ 0	$ 65	$ 2,191	$ 128