Condensed Consolidating Financial Statements (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013		Dec. 31, 2012		Mar. 31, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 34.9		$ 51.8		$ 54.7	$ 45.0
Accounts and notes receivable, net	407.0		373.4
Inventories, net	464.3		374.8
Deferred income taxes, net	29.7		27.5
Other assets	68.2		61.0
Assets of discontinued operations	0		98.6
Total current assets	1,004.1		987.1
Property, plant and equipment, net	295.1		298.2
Goodwill	223.4		223.8	[1]
Deferred income taxes	109.9		102.8
Other assets, net	81.6	[2]	80.0	[2]
Total assets	1,714.1		1,691.9
Current Liabilities:
Short-term debt	26.0		34.9
Current maturities of long-term debt	0.6		0.7
Accounts payable	312.4		284.7
Accrued expenses	222.6		259.6
Income taxes payable	0.8		4.5
Liabilities of discontinued operations	0		55.2
Total current liabilities	562.4		639.6
Long-term debt	489.8		351.0
Post-retirement benefits, other than pensions	5.8		6.1
Pensions	135.7		134.4
Other liabilities	68.4		64.0
Total liabilities	1,262.1		1,195.1
Commitments and contingencies
Total stockholders' equity	452.0		496.8
Total liabilities and stockholders' equity	1,714.1		1,691.9
Parent [Member]
Current assets:
Cash and cash equivalents	0		1.0		0.9	1.0
Accounts and notes receivable, net	(990.1)		(1,178.0)
Inventories, net	0		0
Deferred income taxes, net	2.2		0
Other assets	(14.5)		(0.6)
Assets of discontinued operations	0		0
Total current assets	(1,002.4)		(1,177.6)
Property, plant and equipment, net	0		0
Goodwill	0		0
Deferred income taxes	0.9		0
Other assets, net	2,190.2	[2]	2,176.3	[2]
Total assets	1,188.7		998.7
Current Liabilities:
Short-term debt	86.5		101.9
Current maturities of long-term debt	0		0
Accounts payable	13.4		0
Accrued expenses	8.4		2.5
Income taxes payable	2.6		(27.3)
Liabilities of discontinued operations	0		0
Total current liabilities	110.9		77.1
Long-term debt	474.0		335.0
Post-retirement benefits, other than pensions	0		0
Pensions	0		0
Other liabilities	1.3		0.5
Total liabilities	586.2		412.6
Commitments and contingencies
Total stockholders' equity	602.5		586.1
Total liabilities and stockholders' equity	1,188.7		998.7
Guarantor Subsidiaries [Member]
Current assets:
Cash and cash equivalents	14.0		13.4		16.9	9.7
Accounts and notes receivable, net	873.3		1,076.0
Inventories, net	340.2		257.3
Deferred income taxes, net	23.0		22.9
Other assets	26.3		23.8
Assets of discontinued operations	0		21.2
Total current assets	1,276.8		1,414.6
Property, plant and equipment, net	235.5		239.7
Goodwill	131.8		131.8
Deferred income taxes	94.2		87.8
Other assets, net	534.8	[2]	488.5	[2]
Total assets	2,273.1		2,362.4
Current Liabilities:
Short-term debt	0		0
Current maturities of long-term debt	0.4		0.5
Accounts payable	152.8		133.7
Accrued expenses	155.9		196.6
Income taxes payable	4.5		35.1
Liabilities of discontinued operations	0		42.3
Total current liabilities	313.6		408.2
Long-term debt	15.6		15.6
Post-retirement benefits, other than pensions	5.8		6.1
Pensions	117.3		114.7
Other liabilities	63.9		60.1
Total liabilities	516.2		604.7
Commitments and contingencies
Total stockholders' equity	1,756.9		1,757.7
Total liabilities and stockholders' equity	2,273.1		2,362.4
Non-Guarantor Subsidiaries [Member]
Current assets:
Cash and cash equivalents	20.9		37.4		36.9	34.3
Accounts and notes receivable, net	471.1		427.2
Inventories, net	129.7		121.5
Deferred income taxes, net	6.2		6.3
Other assets	113.2		97.5
Assets of discontinued operations	0		77.4
Total current assets	741.1		767.3
Property, plant and equipment, net	59.6		58.5
Goodwill	91.6		92.0
Deferred income taxes	20.6		20.8
Other assets, net	27.8	[2]	30.3	[2]
Total assets	940.7		968.9
Current Liabilities:
Short-term debt	(60.3)		(51.0)
Current maturities of long-term debt	0.2		0.2
Accounts payable	82.8		92.0
Accrued expenses	58.6		60.8
Income taxes payable	49.5		38.5
Liabilities of discontinued operations	0		12.9
Total current liabilities	130.8		153.4
Long-term debt	99.4		98.7
Post-retirement benefits, other than pensions	0		0
Pensions	18.4		19.7
Other liabilities	10.4		10.6
Total liabilities	259.0		282.4
Commitments and contingencies
Total stockholders' equity	681.7		686.5
Total liabilities and stockholders' equity	940.7		968.9
Eliminations [Member]
Current assets:
Cash and cash equivalents	0		0		0	0
Accounts and notes receivable, net	52.7		48.2
Inventories, net	(5.6)		(4.0)
Deferred income taxes, net	(1.7)		(1.7)
Other assets	(56.8)		(59.7)
Assets of discontinued operations	0		0
Total current assets	(11.4)		(17.2)
Property, plant and equipment, net	0		0
Goodwill	0		0
Deferred income taxes	(5.8)		(5.8)
Other assets, net	(2,671.2)	[2]	(2,615.1)	[2]
Total assets	(2,688.4)		(2,638.1)
Current Liabilities:
Short-term debt	(0.2)		(16.0)
Current maturities of long-term debt	0		0
Accounts payable	63.4		59.0
Accrued expenses	(0.3)		(0.3)
Income taxes payable	(55.8)		(41.8)
Liabilities of discontinued operations	0		0
Total current liabilities	7.1		0.9
Long-term debt	(99.2)		(98.3)
Post-retirement benefits, other than pensions	0		0
Pensions	0		0
Other liabilities	(7.2)		(7.2)
Total liabilities	(99.3)		(104.6)
Commitments and contingencies
Total stockholders' equity	(2,589.1)		(2,533.5)
Total liabilities and stockholders' equity	$ (2,688.4)		$ (2,638.1)

[1] The Goodwill balances presented in the table above are presented net of accumulated impairment charges of $17.0 million, all of which relate to impairments in periods prior to 2012.

[2] (1) Other assets, net consists primarily of Investments in subsidiaries which eliminate upon consolidation.