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4. Product Warranty Liability (Notes)
9 Months Ended
Sep. 30, 2011
Product Warranty Liability [Abstract] 
Product Warranty Liability
4.PRODUCT WARRANTY LIABILITY

We warrant certain equipment against defects in design, materials and workmanship, generally for a period of one year.  Upon delivery of that equipment, we establish, as part of Cost of goods sold, a provision for the expected costs of such warranty based on historical experience, specific warranty terms and customer feedback.  A review is performed on a quarterly basis to assess the adequacy of our 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
16.3

Actual warranty costs
(18.2
)
September 30, 2011
$
16.4