Segment Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2015	Dec. 31, 2015
Segment Reporting Information [Line Items]
Assets	$ 2,794.4		$ 2,794.4			$ 2,784.1
Net sales to external customers:
Net sales	673.6	$ 728.0	1,357.6	$ 1,450.5	$ 140.0
Segment EBIT:
Total EBIT for reportable segments	82.0	92.7	144.8	173.3
Unallocated corporate expenses	(14.5)	(14.0)	(25.2)	(28.2)
Unallocated Portion of Pension Settlement Charges	(0.4)	4.4	(1.6)	(219.6)
Continued Dumping & Subsidy Offset Act (CDSOA) receipts, net of expense	6.1	0.0	53.8	0.0
Interest expense	(8.7)	(8.4)	(17.1)	(16.4)
Investment Income, Interest	0.4	0.7	0.7	1.4
Income (Loss) Before Income Taxes	64.9	66.6	155.4	(89.5)
Mobile Industries [Member]
Net sales to external customers:
Net sales	367.8	388.6	751.0	781.6
Segment EBIT:
Total EBIT for reportable segments	35.3	36.0	65.5	71.4
Process Industries [Member]
Net sales to external customers:
Net sales	305.8	339.4	606.6	668.9
Segment EBIT:
Total EBIT for reportable segments	$ 46.7	$ 56.7	$ 79.3	$ 101.9