Property, Plant And Equipment, Net (Details) (USD $) In Millions, unless otherwise specified					12 Months Ended
	Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2011 Buildings And Improvements [Member]	Dec. 31, 2011 Machinery And Equipment [Member]
Property, Plant and Equipment [Line Items]
Machinery and equipment	$ 3,712		$ 3,388
Buildings and improvements	2,172		2,084
Land and improvements	321		283
Construction in process	313		204
Total property, plant and equipment	6,518	[1]	5,959	[1]
Accumulated depreciation	(3,234)		(2,988)
Property, plant and equipment, net	$ 3,284		$ 2,971
Depreciable life, maximum, years					50	30

[1] Our government customers provide certain facilities; we do not include these facilities above.