Condensed Consolidating Financial Statements (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2013		Dec. 31, 2012		Jun. 30, 2012	Dec. 31, 2011
Current Assets:
Cash and cash equivalents	$ 45.3		$ 51.8		$ 69.1	$ 45.0
Accounts and notes receivable, net	542.3		373.4
Inventories, net	469.2		374.8
Deferred income taxes, net	31.7		27.5
Other assets	41.4		61.0
Assets of discontinued operations	0		98.6
Total current assets	1,129.9		987.1
Property, plant and equipment, net	308.7		298.2
Goodwill	217.6		223.8
Deferred income taxes	113.9		102.8
Other assets, net	79.5	[1]	80.0	[1]
Total assets	1,849.6		1,691.9
Current Liabilities:
Short-term debt	125.9		34.9
Current maturities of long-term debt	0.4		0.7
Accounts payable	373.6		284.7
Accrued expenses	257.1		259.6
Income taxes payable	22.7		4.5
Liabilities of discontinued operations	0		55.2
Total current liabilities	779.7		639.6
Long-term debt	410.8		351.0
Post-retirement benefits, other than pensions	4.9		6.1
Pensions	137.5		134.4
Other liabilities	69.5		64.0
Total liabilities	1,402.4		1,195.1
Commitments and contingencies
Total stockholders' equity	447.2		496.8
Total liabilities and stockholders' equity	1,849.6		1,691.9
Parent [Member]
Current Assets:
Cash and cash equivalents	1.3		1.0		1.0	1.0
Accounts and notes receivable, net	0		0
Inventories, net	0		0
Deferred income taxes, net	4.7		0
Other assets	0		(0.6)
Assets of discontinued operations	0		0
Total current assets	6.0		0.4
Property, plant and equipment, net	0		0
Goodwill	0		0
Deferred income taxes	0.3		0
Other assets, net	2,293.5	[1]	2,176.3	[1]
Total assets	2,299.8		2,176.7
Current Liabilities:
Short-term debt	87.0		101.9
Current maturities of long-term debt	0		0
Accounts payable	1,216.1		1,178.0
Accrued expenses	13.5		2.5
Income taxes payable	(4.1)		(27.3)
Liabilities of discontinued operations	0		0
Total current liabilities	1,312.5		1,255.1
Long-term debt	395.0		335.0
Post-retirement benefits, other than pensions	0		0
Pensions	0		0
Other liabilities	1.7		0.5
Total liabilities	1,709.2		1,590.6
Commitments and contingencies
Total stockholders' equity	590.6		586.1
Total liabilities and stockholders' equity	2,299.8		2,176.7
Guarantor Subsidiaries [Member]
Current Assets:
Cash and cash equivalents	20.3		13.4		24.2	9.7
Accounts and notes receivable, net	1,082.8		1,076.0
Inventories, net	342.2		257.3
Deferred income taxes, net	23.0		22.9
Other assets	36.7		23.8
Assets of discontinued operations	0		21.2
Total current assets	1,505.0		1,414.6
Property, plant and equipment, net	231.9		239.7
Goodwill	131.8		131.8
Deferred income taxes	99.8		87.8
Other assets, net	529.6	[1]	488.5	[1]
Total assets	2,498.1		2,362.4
Current Liabilities:
Short-term debt	0		0
Current maturities of long-term debt	0.3		0.5
Accounts payable	161.9		133.7
Accrued expenses	183.3		196.6
Income taxes payable	49.6		35.1
Liabilities of discontinued operations	0		42.3
Total current liabilities	395.1		408.2
Long-term debt	15.7		15.6
Post-retirement benefits, other than pensions	4.9		6.1
Pensions	119.0		114.7
Other liabilities	64.2		60.1
Total liabilities	598.9		604.7
Commitments and contingencies
Total stockholders' equity	1,899.2		1,757.7
Total liabilities and stockholders' equity	2,498.1		2,362.4
Non-Guarantor Subsidiaries [Member]
Current Assets:
Cash and cash equivalents	23.7		37.4		43.9	34.3
Accounts and notes receivable, net	561.5		427.2
Inventories, net	137.2		121.5
Deferred income taxes, net	5.7		6.3
Other assets	82.1		97.5
Assets of discontinued operations	0		77.4
Total current assets	810.2		767.3
Property, plant and equipment, net	76.8		58.5
Goodwill	85.8		92.0
Deferred income taxes	19.6		20.8
Other assets, net	24.0	[1]	30.3	[1]
Total assets	1,016.4		968.9
Current Liabilities:
Short-term debt	53.6		(51.0)
Current maturities of long-term debt	0.1		0.2
Accounts payable	86.8		92.0
Accrued expenses	60.6		60.8
Income taxes payable	41.0		38.5
Liabilities of discontinued operations	0		12.9
Total current liabilities	242.1		153.4
Long-term debt	91.5		98.7
Post-retirement benefits, other than pensions	0		0
Pensions	18.5		19.7
Other liabilities	10.8		10.6
Total liabilities	362.9		282.4
Commitments and contingencies
Total stockholders' equity	653.5		686.5
Total liabilities and stockholders' equity	1,016.4		968.9
Eliminations [Member]
Current Assets:
Cash and cash equivalents	0		0		0	0
Accounts and notes receivable, net	(1,102.0)		(1,129.8)
Inventories, net	(10.2)		(4.0)
Deferred income taxes, net	(1.7)		(1.7)
Other assets	(77.4)		(59.7)
Assets of discontinued operations	0		0
Total current assets	(1,191.3)		(1,195.2)
Property, plant and equipment, net	0		0
Goodwill	0		0
Deferred income taxes	(5.8)		(5.8)
Other assets, net	(2,767.6)	[1]	(2,615.1)	[1]
Total assets	(3,964.7)		(3,816.1)
Current Liabilities:
Short-term debt	(14.7)		(16.0)
Current maturities of long-term debt	0		0
Accounts payable	(1,091.2)		(1,119.0)
Accrued expenses	(0.3)		(0.3)
Income taxes payable	(63.8)		(41.8)
Liabilities of discontinued operations	0		0
Total current liabilities	(1,170.0)		(1,177.1)
Long-term debt	(91.4)		(98.3)
Post-retirement benefits, other than pensions	0		0
Pensions	0		0
Other liabilities	(7.2)		(7.2)
Total liabilities	(1,268.6)		(1,282.6)
Commitments and contingencies
Total stockholders' equity	(2,696.1)		(2,533.5)
Total liabilities and stockholders' equity	$ (3,964.7)		$ (3,816.1)

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