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Restructuring (Tables)
 3 Months Ended
Mar. 31, 2013
Summary of Restructuring Charges

(in millions)
December 31, 2012
 
Expense
 
Utilization
 
March 31, 2013
Severance
$
4.6

 
$
(0.2
)
 
$
(1.2
)
 
$
3.2

Other
1.7

 
0.1

 
(1.0
)
 
0.8

 
$
6.3

 
$
(0.1
)
 
$
(2.2
)
 
$
4.0