Impairment and Restructuring Charges (Details) (USD $) In Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Impairment And Restructuring Charges By Segment
Impairment charges	$ 0.4		$ 0.4
Severance expense and related benefit costs	0.2	0.1	0.1	5.1
Exit costs	5.6	0.9	6.8	1.4
Total	6.2	1.0	7.3	6.5
Mobile Industries [Member]
Impairment And Restructuring Charges By Segment
Impairment charges	0.1		0.1
Severance expense and related benefit costs	0.2	(0.6)	0.1	1.6
Exit costs	5.4	0.5	6.6	0.9
Total	5.7	(0.1)	6.8	2.5
Process Industries [Member]
Impairment And Restructuring Charges By Segment
Impairment charges	0.2		0.2
Severance expense and related benefit costs				1.6
Exit costs	0.2	0.2	0.2	0.2
Total	0.4	0.2	0.4	1.8
Aerospace and Defense [Member]
Impairment And Restructuring Charges By Segment
Impairment charges	0.1		0.1
Severance expense and related benefit costs		0.8		1.4
Exit costs		0.2	0	0.3
Total	0.1	1.0	0.1	1.7
Steel [Member]
Impairment And Restructuring Charges By Segment
Severance expense and related benefit costs		(0.1)		(0.1)
Total		(0.1)		(0.1)
Corporate [Member]
Impairment And Restructuring Charges By Segment
Severance expense and related benefit costs				0.6
Total				$ 0.6