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4. Product Warranty Liability (Tables)
6 Months Ended
Jun. 30, 2011
Product Warranty Liability [Abstract]  
Components of warranty accrual
Components of the warranty accrual, included in Other current liabilities and Other long-term liabilities in the Condensed Consolidated Balance Sheets, were as follows (in millions):


 
 
 
 
December 31, 2010
$
18.3


Provision for warranty
9.7


Actual warranty costs
(10.0
)
June 30, 2011
$
18.0