Financial Information By Industry Segment And Geographic Area (Information By Geographic Area, Net Sales) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Segment Reporting Information [Line Items]
Net Sales by Geographic Area	$ 7,249	$ 7,406	$ 7,335	$ 7,090	$ 7,075	$ 7,026	$ 7,077	$ 6,655	$ 29,080	[1]	$ 27,833	[1]	$ 26,034	[1]
United States [Member]
Segment Reporting Information [Line Items]
Net Sales by Geographic Area									21,854	[1],[2]	21,523	[1],[2]	19,434	[1],[2]
Europe [Member]
Segment Reporting Information [Line Items]
Net Sales by Geographic Area									3,284	[1]	2,935	[1]	3,183	[1]
Pacific Rim And Asia [Member]
Segment Reporting Information [Line Items]
Net Sales by Geographic Area									2,112	[1]	1,816	[1]	1,807	[1]
Americas, Other Than U.S. [Member]
Segment Reporting Information [Line Items]
Net Sales by Geographic Area									$ 1,830	[1]	$ 1,559	[1]	$ 1,610	[1]

[1] Net sales are attributed to countries based on the location of the seller.

[2] Export sales to unaffiliated customers were $2.4 billion in 2013, $2.2 billion in 2012 and $2.1 billion in 2011.