Business Segments (Segment information) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Business Segment Information
Net sales	$ 7,497	$ 7,531	$ 22,517	$ 22,522
Operating Income	1,678	1,581	5,040	4,814
Industrial and Transportation
Business Segment Information
Net sales	2,566	2,580	7,853	7,671
Operating Income	575	525	1,789	1,585
Health Care
Business Segment Information
Net sales	1,263	1,246	3,826	3,770
Operating Income	400	367	1,216	1,100
Consumer and Office
Business Segment Information
Net sales	1,114	1,096	3,219	3,134
Operating Income	244	244	700	661
Safety, Security and Protection Services
Business Segment Information
Net sales	926	954	2,898	2,894
Operating Income	196	202	685	643
Display and Graphics
Business Segment Information
Net sales	936	935	2,650	2,851
Operating Income	199	179	541	631
Electro and Communications
Business Segment Information
Net sales	820	838	2,452	2,538
Operating Income	186	181	549	559
Corporate and Unallocated
Business Segment Information
Net sales	1	1	4	9
Operating Income	(93)	(91)	(355)	(289)
Elimination of Dual Credit
Business Segment Information
Net sales	(129)	(119)	(385)	(345)
Operating Income	$ (29)	$ (26)	$ (85)	$ (76)