Income Taxes (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Income Taxes [Line Items]
Deferred tax liabilities increase (decrease)	$ (94)	$ (2)
Increase to deferred tax liability	(76)	42
Decrease to deferred tax liability	26	58
Decreases in tax positions of prior years	15
Increases in tax positions for prior years	6
Advanced Engineered Materials [Member] | Polyplastics Co., Ltd. [Member]
Income Taxes [Line Items]
Foreign tax credit carryforwards	142
Foreign tax credit carryforward period	ten year carryforward period
Foreign tax credit carryforward expiration	2014
Cash dividend payment	72
Deferred tax liability	38
Deferred tax liabilities increase (decrease)	9
Increase to deferred tax liability	5
Decrease to deferred tax liability	$ 4