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Accrued Warranty Costs (Tables)
 6 Months Ended
Jun. 30, 2013
Commitments and Contingencies Disclosure [Abstract]  
Changes in product warranty liability
The following table presents the changes in the Company’s product warranty liability:
 
2013
 
2012
Balance at January 1,
$
6.9

 
$
4.2

Claims paid during the year
(1.9
)
 
(0.9
)
Warranty expense
2.6

 
1.4

Acquired warranty liabilities
—

 
3.3

Balance at June 30,
$
7.6

 
$
8.0