Condensed Consolidating Financial Statements (Details) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2014	Dec. 31, 2013
Current Assets:
Cash and cash equivalents	$ 47.5	$ 37.5	$ 49.6	$ 38.0
Accounts and notes receivable, net	609.3	421.4
Inventories, net	540.7	463.3
Deferred income taxes, net	31.6	32.5
Other assets	57.6	59.3
Total current assets	1,286.7	1,014.0
Property, plant and equipment, net	352.1	358.6
Goodwill	204.5	209.4
Investments in subsidiaries	0.0	0.0
Deferred income taxes	95.0	97.5
Other assets, net	88.0	84.8
Intercompany receivables (payables)	0.0	0.0
Total assets	2,026.3	1,764.3
Current Liabilities:
Short-term debt	226.1	226.6
Current maturities of long-term debt	16.3	24.0
Accounts payable	404.3	324.3
Accrued expenses	241.6	239.0
Income taxes payable	10.4	13.4
Total current liabilities	898.7	827.3
Long-term debt	813.2	675.0
Post-retirement benefits, other than pensions	3.4	4.5
Pensions	133.2	129.9
Other liabilities	121.5	118.6
Total liabilities	$ 1,970.0	$ 1,755.3
Commitments and contingencies
Total stockholders’ equity	$ 56.3	$ 9.0
Total liabilities and stockholders' equity	2,026.3	1,764.3
Parent [Member]
Current Assets:
Cash and cash equivalents	1.7	1.0	0.9	1.1
Accounts and notes receivable, net	0.0	0.0
Inventories, net	0.0	0.0
Deferred income taxes, net	1.9	2.8
Other assets	3.4	3.6
Total current assets	7.0	7.4
Property, plant and equipment, net	0.0	0.0
Goodwill	0.0	0.0
Investments in subsidiaries	1,054.6	978.1
Deferred income taxes	1.4	0.5
Other assets, net	4.7	5.2
Intercompany receivables (payables)	(178.3)	(280.4)
Total assets	889.4	710.8
Current Liabilities:
Short-term debt	0.0	0.0
Current maturities of long-term debt	15.0	22.5
Accounts payable	16.2	13.4
Accrued expenses	7.6	9.0
Income taxes payable	(4.7)	(3.7)
Total current liabilities	34.1	41.2
Long-term debt	798.1	659.5
Post-retirement benefits, other than pensions	0.0	0.0
Pensions	0.0	0.0
Other liabilities	0.9	1.1
Total liabilities	833.1	$ 701.8
Commitments and contingencies
Total stockholders’ equity	56.3	$ 9.0
Total liabilities and stockholders' equity	889.4	710.8
Guarantor Subsidiaries [Member]
Current Assets:
Cash and cash equivalents	21.7	11.5	19.1	10.5
Accounts and notes receivable, net	39.8	12.3
Inventories, net	419.1	350.6
Deferred income taxes, net	27.4	27.3
Other assets	48.0	45.7
Total current assets	556.0	447.4
Property, plant and equipment, net	269.4	269.0
Goodwill	140.4	140.4
Investments in subsidiaries	473.9	263.5
Deferred income taxes	88.8	90.8
Other assets, net	60.2	61.0
Intercompany receivables (payables)	178.1	302.4
Total assets	1,766.8	1,574.5
Current Liabilities:
Short-term debt	0.0	0.0
Current maturities of long-term debt	1.1	1.2
Accounts payable	317.0	237.8
Accrued expenses	176.1	175.5
Income taxes payable	57.9	34.7
Total current liabilities	552.1	449.2
Long-term debt	15.0	15.3
Post-retirement benefits, other than pensions	3.4	4.5
Pensions	121.6	117.6
Other liabilities	122.9	118.7
Total liabilities	815.0	$ 705.3
Commitments and contingencies
Total stockholders’ equity	951.8	$ 869.2
Total liabilities and stockholders' equity	1,766.8	1,574.5
Non-Guarantor Subsidiaries [Member]
Current Assets:
Cash and cash equivalents	24.1	25.0	29.6	26.4
Accounts and notes receivable, net	569.5	409.1
Inventories, net	129.4	119.7
Deferred income taxes, net	7.4	7.4
Other assets	64.8	67.2
Total current assets	795.2	628.4
Property, plant and equipment, net	82.7	89.6
Goodwill	64.1	69.0
Investments in subsidiaries	(0.6)	(0.6)
Deferred income taxes	14.4	15.8
Other assets, net	24.6	20.1
Intercompany receivables (payables)	0.2	(22.0)
Total assets	980.6	800.3
Current Liabilities:
Short-term debt	226.1	226.6
Current maturities of long-term debt	0.2	0.3
Accounts payable	71.1	73.1
Accrued expenses	57.9	54.5
Income taxes payable	23.9	47.5
Total current liabilities	379.2	402.0
Long-term debt	0.1	0.2
Post-retirement benefits, other than pensions	0.0	0.0
Pensions	11.6	12.3
Other liabilities	10.6	11.7
Total liabilities	401.5	$ 426.2
Commitments and contingencies
Total stockholders’ equity	579.1	$ 374.1
Total liabilities and stockholders' equity	980.6	800.3
Eliminations [Member]
Current Assets:
Cash and cash equivalents	0.0	0.0	$ 0.0	$ 0.0
Accounts and notes receivable, net	0.0	0.0
Inventories, net	(7.8)	(7.0)
Deferred income taxes, net	(5.1)	(5.0)
Other assets	(58.6)	(57.2)
Total current assets	(71.5)	(69.2)
Property, plant and equipment, net	0.0	0.0
Goodwill	0.0	0.0
Investments in subsidiaries	(1,527.9)	(1,241.0)
Deferred income taxes	(9.6)	(9.6)
Other assets, net	(1.5)	(1.5)
Intercompany receivables (payables)	0.0	0.0
Total assets	(1,610.5)	(1,321.3)
Current Liabilities:
Short-term debt	0.0	0.0
Current maturities of long-term debt	0.0	0.0
Accounts payable	0.0	0.0
Accrued expenses	0.0	0.0
Income taxes payable	(66.7)	(65.1)
Total current liabilities	(66.7)	(65.1)
Long-term debt	0.0	0.0
Post-retirement benefits, other than pensions	0.0	0.0
Pensions	0.0	0.0
Other liabilities	(12.9)	(12.9)
Total liabilities	(79.6)	$ (78.0)
Commitments and contingencies
Total stockholders’ equity	(1,530.9)	$ (1,243.3)
Total liabilities and stockholders' equity	$ (1,610.5)	$ (1,321.3)