Impairment and Restructuring Charges (Details Textual) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011	Dec. 31, 2010
Restructuring and Related Cost [Line Items]
Tangible Asset Impairment Charges	$ 6.4	$ 0.1	$ 6.4	$ 0.5
Exit costs	4.2	1.0	4.5	7.8
Restructuring accrual	18.4		18.4		21.8	22.1
Severance Costs	1.3	0.1	17.9	0.2
Environmental Remediation Expense [Member]
Restructuring and Related Cost [Line Items]
Restructuring accrual	6.8		6.8
Mobile Industries [Member]
Restructuring and Related Cost [Line Items]
Tangible Asset Impairment Charges	6.4	0	6.4	0.1
Exit costs	4.2	0.9	4.5	7.5
Severance Costs	0.3	0.1	16.6	0.2
Mobile Industries [Member] | Sao Paulo [Member]
Restructuring and Related Cost [Line Items]
Expected pretax costs approximately			60
Cumulative pre tax	56.8		56.8
Exit costs	4.2	0.9	7.1	6.9
Minimum estimated liability for the site	5.8		5.8
Maximum estimated liability for the site	9.7		9.7
Mobile Industries [Member] | Sao Paulo [Member] | Environmental Remediation Expense [Member]
Restructuring and Related Cost [Line Items]
Restructuring accrual	5.8		5.8
Mobile Industries [Member] | Columbus Ohio [Member]
Restructuring and Related Cost [Line Items]
Favorable adjustment to environmental exit costs			2.7
St. Thomas Ontario Canada [Domain]
Restructuring and Related Cost [Line Items]
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements and Curtailments			10.7
Restructuring and Related Cost, Number of Positions Eliminated			190
Cumulative pre tax	26.1		26.1
Tangible Asset Impairment Charges		6.4
Minimum restructuring and related cost expected cost approximatel			55
Maximum expected pretax costs approximately			65
Minimum expected cash pretax costs approximately			20
Maximum expected pretax cash costs approximately			25
Severance Costs			16.8
Process Industries [Member]
Restructuring and Related Cost [Line Items]
Tangible Asset Impairment Charges	0	0.1	0	0.3
Exit costs	0	0.1	0	0.3
Severance Costs	1.0	0	1.3	0
Aerospace and Defense [Member]
Restructuring and Related Cost [Line Items]
Tangible Asset Impairment Charges		0	0	0.1
Exit costs	0	0	0	0
Severance Costs	$ 0	$ 0	$ 0	$ 0