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Other, Net (Tables)
 3 Months Ended
Mar. 31, 2018
Other Income and Expenses [Abstract]  
Summary of other, net (income) expense
Other, net (income) expense consists of the following items:
 
Three Months Ended
March 31,
 
2018
 
2017
 
(in millions)
Foreign currency exchange transactions
$
0.9

 
$
1.6

Loss on equity investments
0.1

 
—

Pension cost
(1.1
)
 
(0.7
)
Other
(0.1
)
 
(0.8
)
Other, net
$
(0.2
)
 
$
0.1