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5. Product Warranty Liability (Tables)
3 Months Ended
Mar. 31, 2012
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, 2011
$
16.4

Provision for warranty
3.9

Actual warranty costs
(4.9
)
March 31, 2012
$
15.4