Condensed Consolidating Financial Statements (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013	Dec. 31, 2012
Current Assets:
Cash and cash equivalents	$ 49.6	$ 38.0	$ 45.3	$ 51.8
Accounts and notes receivable, net	576.5	408.1
Inventories, net	514.9	378.8
Deferred income taxes, net	23.5	24.5
Other assets	58.2	53.0
Total current assets	1,222.7	902.4
Property, plant and equipment, net	350.5	335.5
Goodwill	219.7	216.8
Investments in subsidiaries	0	0
Deferred income taxes	86.4	88.5
Other assets, net	90.8	83.5
Intercompany receivables (payables)	0	0
Total assets	1,970.1	1,626.7
Current Liabilities:
Short-term debt	185.6	165.9
Current maturities of long-term debt	1.3	1.3
Accounts payable	400.9	283.1
Accrued expenses	236.6	232.1
Income taxes payable	22.9	31.6
Total current liabilities	847.3	714.0
Long-term debt	419.8	233.2
Post-retirement benefits, other than pensions	3.3	4.6
Pensions	60.7	70.0
Other liabilities	121.0	119.2
Total liabilities	1,452.1	1,141.0
Commitments and contingencies
Total stockholders’ equity	518.0	485.7
Total liabilities and stockholders' equity	1,970.1	1,626.7
Parent [Member]
Current Assets:
Cash and cash equivalents	0.9	1.1	1.3	1.0
Accounts and notes receivable, net	0	0
Inventories, net	0	0
Deferred income taxes, net	(0.4)	0.9
Other assets	3.5	3.4
Total current assets	4.0	5.4
Property, plant and equipment, net	0	0
Goodwill	0	0
Investments in subsidiaries	1,276.0	1,138.8
Deferred income taxes	1.0	0
Other assets, net	3.9	4.2
Intercompany receivables (payables)	(305.2)	(460.6)
Total assets	979.7	687.8
Current Liabilities:
Short-term debt	0	0
Current maturities of long-term debt	0	0
Accounts payable	14.6	11.8
Accrued expenses	3.0	3.3
Income taxes payable	40.7	(30.3)
Total current liabilities	58.3	(15.2)
Long-term debt	403.0	217.0
Post-retirement benefits, other than pensions	0	0
Pensions	0	0
Other liabilities	0.4	0.3
Total liabilities	461.7	202.1
Commitments and contingencies
Total stockholders’ equity	518.0	485.7
Total liabilities and stockholders' equity	979.7	687.8
Guarantor Subsidiaries [Member]
Current Assets:
Cash and cash equivalents	19.1	10.5	20.3	13.4
Accounts and notes receivable, net	19.8	12.8
Inventories, net	376.3	253.6
Deferred income taxes, net	21.2	21.2
Other assets	46.7	38.4
Total current assets	483.1	336.5
Property, plant and equipment, net	252.6	246.4
Goodwill	140.4	140.4
Investments in subsidiaries	468.4	337.5
Deferred income taxes	73.7	76.9
Other assets, net	64.6	64.3
Intercompany receivables (payables)	299.4	434.0
Total assets	1,782.2	1,636.0
Current Liabilities:
Short-term debt	0	0
Current maturities of long-term debt	0.9	1.0
Accounts payable	300.3	187.8
Accrued expenses	169.1	168.4
Income taxes payable	2.3	75.7
Total current liabilities	472.6	432.9
Long-term debt	16.5	15.8
Post-retirement benefits, other than pensions	3.3	4.6
Pensions	50.4	58.4
Other liabilities	120.6	119.4
Total liabilities	663.4	631.1
Commitments and contingencies
Total stockholders’ equity	1,118.8	1,004.9
Total liabilities and stockholders' equity	1,782.2	1,636.0
Non-Guarantor Subsidiaries [Member]
Current Assets:
Cash and cash equivalents	29.6	26.4	23.7	37.4
Accounts and notes receivable, net	556.7	395.3
Inventories, net	144.1	128.4
Deferred income taxes, net	6.0	5.7
Other assets	75.6	70.2
Total current assets	812.0	626.0
Property, plant and equipment, net	97.9	89.1
Goodwill	79.3	76.4
Investments in subsidiaries	(0.5)	(0.6)
Deferred income taxes	20.3	20.2
Other assets, net	23.7	16.4
Intercompany receivables (payables)	5.8	26.6
Total assets	1,038.5	854.1
Current Liabilities:
Short-term debt	185.6	165.9
Current maturities of long-term debt	0.4	0.3
Accounts payable	86.0	83.5
Accrued expenses	64.7	60.4
Income taxes payable	53.0	49.9
Total current liabilities	389.7	360.0
Long-term debt	0.3	0.4
Post-retirement benefits, other than pensions	0	0
Pensions	10.3	11.6
Other liabilities	11.8	11.3
Total liabilities	412.1	383.3
Commitments and contingencies
Total stockholders’ equity	626.4	470.8
Total liabilities and stockholders' equity	1,038.5	854.1
Eliminations [Member]
Current Assets:
Cash and cash equivalents	0	0	0	0
Accounts and notes receivable, net	0	0
Inventories, net	(5.5)	(3.2)
Deferred income taxes, net	(3.3)	(3.3)
Other assets	(67.6)	(59.0)
Total current assets	(76.4)	(65.5)
Property, plant and equipment, net	0	0
Goodwill	0	0
Investments in subsidiaries	(1,743.9)	(1,475.7)
Deferred income taxes	(8.6)	(8.6)
Other assets, net	(1.4)	(1.4)
Intercompany receivables (payables)		0
Total assets	(1,830.3)	(1,551.2)
Current Liabilities:
Short-term debt	0	0
Current maturities of long-term debt	0	0
Accounts payable	0	0
Accrued expenses	(0.2)	0
Income taxes payable	(73.1)	(63.7)
Total current liabilities	(73.3)	(63.7)
Long-term debt	0	0
Post-retirement benefits, other than pensions	0	0
Pensions	0	0
Other liabilities	(11.8)	(11.8)
Total liabilities	(85.1)	(75.5)
Commitments and contingencies
Total stockholders’ equity	(1,745.2)	(1,475.7)
Total liabilities and stockholders' equity	$ (1,830.3)	$ (1,551.2)