Financial Information By Industry Segment And Geographic Area Financial Information By Industry Segment and Geographic Area (Information By Geographic Area, Net Sales Footnotes) (Details) - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
United States [Member]
Segment Reporting Information [Line Items]
Segment reporting information, unaffiliated revenue	$ 2.0	$ 2.3	$ 2.4