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Pensions
 6 Months Ended
Sep. 30, 2017
Pensions [Abstract]  
Pensions
Note 4: Pensions

Pension cost included the following components:

  
Three months ended
September 30,
  
Six months ended
 September 30,
 
  
2017
  
2016
  
2017
  
2016
 
Service cost
 
$
0.2
  
$
0.2
  
$
0.3
  
$
0.3
 
Interest cost
  
2.4
   
2.4
   
4.9
   
4.8
 
Expected return on plan assets
  
(3.0
)
  
(3.1
)
  
(6.0
)
  
(6.1
)
Amortization of unrecognized net loss
  
1.4
   
1.4
   
2.8
   
2.8
 
Net periodic benefit cost
 
$
1.0
  
$
0.9
  
$
2.0
  
$
1.8
 
 
During the six months ended September 30, 2017 and 2016, the Company contributed $4.5 million and $3.3 million, respectively, to its U.S. pension plans.