Business Segment and Geographic Data Information (Consolidated Operations by Geographic Area) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Net Property	$ 8,095		$ 8,049		$ 8,356
Operating Profit	2,686		2,442		2,773
Net Sales	21,063		20,846		19,746
United States [Member]
Net Property	4,040		4,124		4,290
Operating Profit	1,915	[1]	1,754	[1]	1,901	[1]
Net Sales	10,512		10,463		10,480
Canada [Member]
Intergeographic net sales	81		89		95
Net Property	31		28		30
Operating Profit	138	[1]	161	[1]	125	[1]
Net Sales	718		726		684
Inter Geographic items North America [Member]
Net Property
Operating Profit
Net Sales	(453)	[2]	(443)	[2]	(445)	[2]
Total North America [Member]
Net Property	4,071		4,152		4,320
Operating Profit	2,053		1,915		2,026
Net Sales	10,777		10,746		10,719
Europe [Member]
Net Property	1,321		1,439		1,552
Operating Profit	227	[1]	170	[1]	222	[1]
Net Sales	3,247		3,401		3,179
Asia, Latin America and Other [Member]
Net Property	2,703		2,458		2,484
Operating Profit	1,041	[1]	922	[1]	818	[1]
Net Sales	7,851		7,467		6,561
Inter Geographic Items [Member]
Net Property
Operating Profit
Net Sales	(812)		(768)		(713)
Corporate and Other [Member]
Net Property
Operating Profit	(635)	[1]	(565)	[1]	(293)	[1]
Net Sales

[1] Geographic operating profit excludes Other (income) and expense, net and income and expenses not associated with geographic areas.

[2] Intergeographic net sales include $81, $89 and $95 by operations in Canada to the U.S. in 2012, 2011 and 2010, respectively.