Operating Segments (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013 Segment	Jun. 30, 2012
Financial information of reportable segments
Number of operating units			10
Number of reportable segments			4
Net sales	$ 3,337.8	$ 2,958.7	$ 6,209.9	$ 5,769.6
Operating Income	352.3	326.5	614.0	492.3
Subtotal at fixed currency
Financial information of reportable segments
Net sales	3,356.3	2,946.2	6,218.1	5,741.8
Operating Income	355.6	326.0	616.5	491.7
Global Industrial
Financial information of reportable segments
Net sales	1,220.2	1,178.7	2,360.9	2,308.6
Operating Income	157.3	134.1	274.4	232.2
Global Institutional
Financial information of reportable segments
Net sales	1,054.9	1,028.5	2,029.6	1,979.8
Operating Income	193.6	180.6	338.9	313.5
Global Energy
Financial information of reportable segments
Net sales	901.0	550.1	1,480.1	1,089.0
Operating Income	131.1	79.1	209.9	161.2
Other
Financial information of reportable segments
Net sales	180.2	188.9	347.5	364.4
Operating Income	26.2	27.4	46.8	47.3
Corporate
Financial information of reportable segments
Operating Income	(152.6)	(95.2)	(253.5)	(262.5)
Currency impact
Financial information of reportable segments
Net sales	(18.5)	12.5	(8.2)	27.8
Operating Income	(3.3)	0.5	(2.5)	0.6
Intersegment
Financial information of reportable segments
Net sales			$ 0