Impairment and Restructuring Charges (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Impairment and Restructuring Charges for the Mobile Segment
Severance expense and related benefit costs	$ 1.0
Exit costs	0.2
Total	1.2	0.2
Mobile Industries [Member]
Impairment and Restructuring Charges for the Mobile Segment
Severance expense and related benefit costs	0.8	0.1
Exit costs	0.2	0.1
Total	1.0	0.2
Process Industries [Member]
Impairment and Restructuring Charges for the Mobile Segment
Severance expense and related benefit costs	0.2
Exit costs	0
Total	$ 0.2