Acquisitions, Dispositions, Ventures and Plant Closures (Acquisitions Narrative) (Details) (DuPont Performance Polymers [Member], Advanced Engineered Materials [Member], USD $) In Millions, unless otherwise specified	Dec. 31, 2011
DuPont Performance Polymers [Member] | Advanced Engineered Materials [Member]
Business Acquisition [Line Items]
Inventories purchased	$ 12