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Retirement Plans (Tables)
 6 Months Ended
Jun. 30, 2016
Retirement Plans  
Components of net periodic benefit cost

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Three Months Ended

 

Six Months Ended

 

 

 

June 30,

 

June 30,

 

(in millions)

    

2016

    

2015

    

2016

    

2015

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Service cost

 

$
0.9

 

$
0.9

 

$
1.7

 

$
1.9

 

Interest cost

 

 
1.4

 

 
1.8

 

 
2.7

 

 
3.5

 

Expected return on plan assets

 

 
(2.6)

 

 
(2.6)

 

 
(5.1)

 

 
(5.2)

 

Amortization of unrecognized loss

 

 
0.6

 

 
1.3

 

 
1.2

 

 
2.6

 

Net periodic benefit cost

 

$
0.3

 

$
1.4

 

$
0.5

 

$
2.8