Condensed Consolidating Financial Statements (Balance Sheets) (Details) - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015	Dec. 31, 2014
Current Assets:
Cash and cash equivalents	$ 40.6	$ 38.9	$ 36.7	$ 37.5
Accounts and notes receivable, net	469.8	422.8
Inventories, net	518.1	418.8
Deferred income taxes, net		0.0
Other assets	93.1	57.7
Total current assets	1,121.6	938.2
Property, plant and equipment, net	338.5	339.6
Goodwill	197.0	195.1
Investment in subsidiaries	0.0	0.0
Deferred income taxes	140.5	145.7
Other assets, net	63.4	58.8
Intercompany receivables (payables), net	0.0	0.0
Total assets	1,861.0	1,677.4
Current Liabilities:
Short-term debt	184.0	204.1
Current maturities of long-term debt	30.9	31.0
Accounts payable	378.3	320.1
Accrued expenses	209.4	242.6
Income taxes payable	0.6	26.0
Total current liabilities	803.2	823.8
Long-term debt	884.5	506.0
Post-retirement benefits, other than pensions	3.4	4.1
Pensions	121.9	120.8
Other liabilities	121.3	121.1
Total liabilities	$ 1,934.3	$ 1,575.8
Commitments and contingencies
Total stockholders' equity	$ (73.3)	$ 101.6
Total liabilities and stockholders' equity	1,861.0	1,677.4
Parent [Member]
Current Assets:
Cash and cash equivalents	1.0	0.5	1.2	1.0
Accounts and notes receivable, net	0.0	0.0
Inventories, net	0.0	0.0
Deferred income taxes, net		0.0
Other assets	3.6	3.3
Total current assets	4.6	3.8
Property, plant and equipment, net	0.0	0.0
Goodwill	0.0	0.0
Investment in subsidiaries	916.4	879.0
Deferred income taxes	3.7	5.4
Other assets, net	2.3	1.5
Intercompany receivables (payables), net	(73.8)	(278.6)
Total assets	853.2	611.1
Current Liabilities:
Short-term debt	0.0	0.0
Current maturities of long-term debt	29.8	29.8
Accounts payable	15.6	16.1
Accrued expenses	11.8	15.8
Income taxes payable	(0.1)	(43.0)
Total current liabilities	57.1	18.7
Long-term debt	869.1	490.4
Post-retirement benefits, other than pensions	0.0	0.0
Pensions	0.0	0.0
Other liabilities	0.3	0.4
Total liabilities	926.5	509.5
Total stockholders' equity	(73.3)	101.6
Total liabilities and stockholders' equity	853.2	611.1
Guarantor Subsidiaries [Member]
Current Assets:
Cash and cash equivalents	15.2	7.8	11.9	11.5
Accounts and notes receivable, net	38.1	25.9
Inventories, net	409.9	324.3
Deferred income taxes, net		0.0
Other assets	52.2	46.9
Total current assets	515.4	404.9
Property, plant and equipment, net	259.5	261.8
Goodwill	134.9	134.9
Investment in subsidiaries	380.2	337.6
Deferred income taxes	122.9	126.6
Other assets, net	38.0	38.2
Intercompany receivables (payables), net	61.7	253.3
Total assets	1,512.6	1,557.3
Current Liabilities:
Short-term debt	0.0	0.0
Current maturities of long-term debt	0.8	0.8
Accounts payable	297.6	237.9
Accrued expenses	145.5	176.7
Income taxes payable	10.5	106.6
Total current liabilities	454.4	522.0
Long-term debt	15.0	15.1
Post-retirement benefits, other than pensions	3.4	4.1
Pensions	113.2	111.9
Other liabilities	114.5	114.4
Total liabilities	700.5	767.5
Total stockholders' equity	812.1	789.8
Total liabilities and stockholders' equity	1,512.6	1,557.3
Non-Guarantor Subsidiaries [Member]
Current Assets:
Cash and cash equivalents	24.4	30.6	23.6	25.0
Accounts and notes receivable, net	431.7	396.9
Inventories, net	114.7	98.9
Deferred income taxes, net		0.0
Other assets	98.4	67.4
Total current assets	669.2	593.8
Property, plant and equipment, net	79.0	77.8
Goodwill	62.1	60.2
Investment in subsidiaries	(0.6)	(0.6)
Deferred income taxes	28.8	28.4
Other assets, net	24.6	20.6
Intercompany receivables (payables), net	12.1	25.3
Total assets	875.2	805.5
Current Liabilities:
Short-term debt	184.0	204.1
Current maturities of long-term debt	0.3	0.4
Accounts payable	65.1	66.1
Accrued expenses	52.1	50.1
Income taxes payable	67.7	37.9
Total current liabilities	369.2	358.6
Long-term debt	0.4	0.5
Post-retirement benefits, other than pensions	0.0	0.0
Pensions	8.7	8.9
Other liabilities	11.0	10.5
Total liabilities	389.3	378.5
Total stockholders' equity	485.9	427.0
Total liabilities and stockholders' equity	875.2	805.5
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	(6.5)	(4.4)
Deferred income taxes, net		0.0
Other assets	(61.1)	(59.9)
Total current assets	(67.6)	(64.3)
Property, plant and equipment, net	0.0	0.0
Goodwill	0.0	0.0
Investment in subsidiaries	(1,296.0)	(1,216.0)
Deferred income taxes	(14.9)	(14.7)
Other assets, net	(1.5)	(1.5)
Intercompany receivables (payables), net	0.0	0.0
Total assets	(1,380.0)	(1,296.5)
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	(77.5)	(75.5)
Total current liabilities	(77.5)	(75.5)
Long-term debt	0.0	0.0
Post-retirement benefits, other than pensions	0.0	0.0
Pensions	0.0	0.0
Other liabilities	(4.5)	(4.2)
Total liabilities	(82.0)	(79.7)
Total stockholders' equity	(1,298.0)	(1,216.8)
Total liabilities and stockholders' equity	$ (1,380.0)	$ (1,296.5)