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5. Product Warranty Liability (Tables)
 6 Months Ended
Jun. 30, 2014
Product Warranties Disclosures [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):

January 1, 2014
$
15.6

Provision for warranty
10.4

Actual warranty costs
(10.4
)
June 30, 2014
$
15.6