Net Plant and Equipment Components of Plant and Equipment (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Abstract]
Land	$ 189	$ 237
Buildings and improvements	1,235	1,496
Machinery and equipment	3,145	3,761
Equipment leased to others	160	180
Construction in progress	143	157
Gross plant and equipment	4,872	5,831
Accumulated depreciation	(3,163)	(3,837)
Net plant and equipment	$ 1,709	$ 1,994