Warranties (Details) (USD $) In Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Changes in the accruals for warranties
Beginning balance	$ 12.0	$ 18.6	$ 13.2	$ 19.6
Warranty costs incurred	(1.6)	(1.0)	(4.3)	(3.2)
Warranty originations and revisions	2.1	0.4	4.6	3.3
Warranty expirations	(0.9)	(0.5)	(1.9)	(2.2)
Ending balance	$ 11.6	$ 17.5	$ 11.6	$ 17.5
Warranties (Textual)
Product warranty period, minimum			1 year
Product warranty period, maximum			5 years