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Product Warranty (Tables)
 6 Months Ended
Jun. 30, 2013
Product Warranties Disclosures [Abstract]  
Schedule of Product Warranty Liability
The following table summarizes the activity in the product warranty accrual accounts:

(millions of dollars)
2013
 
2012
Beginning balance, January 1
$
64.9

 
$
72.7

Provisions
21.0

 
17.1

Payments
(18.2
)
 
(16.5
)
Translation adjustment
(1.2
)
 
(0.9
)
Ending balance, June 30
$
66.5

 
$
72.4



The product warranty liability is classified in the Condensed Consolidated Balance Sheets as follows:
 
June 30,
 
December 31,
(millions of dollars)
2013
 
2012
Accounts payable and accrued expenses
$
34.9

 
$
33.1

Other non-current liabilities
31.6

 
31.8

Total product warranty liability
$
66.5

 
$
64.9