Segment And Geographic Area Information (Schedule Of Reconciliation Of Certain Segment Information To Consolidated Totals) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2009
Segment And Geographic Area Information [Abstract]
Total segment sales									$ 30,826		$ 25,735		$ 21,654
Elimination of intersegment sales									(6,137)		(4,989)		(3,483)
Corporate									262	[1]	267	[1]	268	[1]
Consolidated sales	$ 5,989	$ 6,419	$ 6,585	$ 5,958	$ 5,652	$ 5,287	$ 5,187	$ 4,887	$ 24,951		$ 21,013		$ 18,439

[1] For all periods presented, the Corporate amount includes third-party sales of three soft alloy extrusion facilities located in Brazil.