Discontinued Operations - Other Divestitures (Details) - Disposal Group, Disposed of by Sale, Not Discontinued Operations - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total External Sales	$ 15.9	$ 45.9	$ 34.8	$ 93.4
Total EBIT	2.1	1.1	4.0	2.5
One Wire Products operation
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total External Sales	8.1	12.5	19.5	25.4
Total EBIT	0.8	0.3	1.2	0.2
Steel Tubing business unit
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total External Sales	0.0	23.1	0.0	47.9
Total EBIT	0.0	0.5	0.0	1.3
One Commercial Vehicle Products (CVP) operation
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total External Sales	7.8	6.3	15.3	13.3
Total EBIT	1.3	0.7	2.8	1.7
Gain related to sale of operation	11.2
One CVP operation
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total External Sales	0.0	4.0	0.0	6.8
Total EBIT	$ 0.0	$ (0.4)	$ 0.0	$ (0.7)