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Warranties (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Changes in the accruals for warranties
Beginning balance	$ 13.2	$ 19.6	$ 25.7
Warranty costs incurred	(6.3)	(5.7)	(8.6)
Warranty originations and revisions	9.1	1.9	9.8
Warranty expirations	(2.5)	(2.6)	(7.3)
Ending balance	$ 13.5	$ 13.2	$ 19.6

- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers.

+ References+ Details