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Commitments and Contingencies (Tables)
3 Months Ended
Mar. 31, 2014
Commitments and Contingencies Disclosure [Abstract]  
Summary of Changes in Warranty Liabilities
The following table summarizes the changes in the Company’s warranty liabilities:
 
Three Months Ended 
 March 31,
(in millions)
2014
 
2013
Balance at January 1
$
8.4

 
$
6.8

Provisions to expense
1.7

 
2.2

Payments
(1.6
)
 
(1.8
)
Balance at March 31
$
8.5

 
$
7.2