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Warranties (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Changes in the accruals for warranties
Beginning balance	$ 13.5	$ 13.2
Warranty costs incurred	(2.4)	(1.3)
Warranty originations and revisions	3.8	1.6
Warranty expirations	(0.4)	(0.8)
Ending balance	$ 14.5	$ 12.7

- 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