Income Taxes (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
	Mar. 31, 2012	Jun. 30, 2013	Jun. 30, 2012
Income Taxes [Line Items]
Effective income tax rate, excluding foreign tax credit carryforwards and reinvestment of foreign earnings			22.00%
Foreign tax credit carryforwards	$ 142
Foreign tax credit carryforward period	ten year carryforward period
Foreign tax credit carryforward expiration	2014 through 2021
Increases in tax positions for the current year		5
Decreases in tax positions due to exchange rate changes		1
Advanced Engineered Materials [Member] | Polyplastics Co., Ltd. [Member]
Income Taxes [Line Items]
Cash dividend payment	72
Deferred tax liability	$ 38