Business Segments (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 30, 2011 Y Acquisitions Segments	Dec. 31, 2010 Industrial and Transportation	Dec. 31, 2010 Health Care	Dec. 31, 2010 Safety, Security and Protection Services	Dec. 31, 2010 Electro and Communications	Dec. 31, 2010 Elimination of Dual Credit and Corporate and Unallocated
Business Segments
Number of operating business segments	6
Business Segment Information
Increase (decrease) in net sales due to product transfers		$ (152)	$ (8)	$ 8	$ 121	$ 31