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Warranties
 9 Months Ended
Sep. 30, 2012
Commitments and Contingencies Disclosure [Abstract]  
Warranties
Warranties

The changes in the accruals for warranties for the three and nine month periods ended September 30, 2012 and 2011 are as follows:

 
 
Three Months Ended
September 30,
 
Nine Months Ended
September 30,
 
 
2012
 
2011
 
2012
 
2011
 
 
(in millions)
Beginning balance
 
$
13.8

 
$
12.0

 
$
13.5

 
$
13.2

Warranty costs incurred
 
(1.1
)
 
(1.6
)
 
(5.0
)
 
(4.3
)
Warranty originations and revisions
 
2.6

 
2.1

 
7.8

 
4.6

Warranty expirations
 
(0.6
)
 
(0.9
)
 
(1.6
)
 
(1.9
)
Ending balance
 
$
14.7

 
$
11.6

 
$
14.7

 
$
11.6