Discontinued Operations (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Product Warranty Accrual, Period Increase (Decrease)	$ 0.4	$ (3.4)	$ (0.8)
Segment, Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Product Warranty Accrual, Period Increase (Decrease)	$ 12.0	$ 7.1	$ 4.9