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Employee Retirement Benefits (Tables)
 6 Months Ended
Jun. 30, 2017
Compensation and Retirement Disclosure [Abstract]  
Schedule of Net Periodic Costs
he following table sets forth the net periodic pension cost (benefit) (in millions):
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2017
 
2016
 
2017
 
2016
Components of Net Periodic Pension Cost (Benefit):
 
 
 
 
 
 
 
Interest cost
$
1.5

 
$
1.5

 
$
3.0

 
$
3.1

Expected return on plan assets
(1.5
)
 
(2.0
)
 
(3.1
)
 
(4.0
)
Net amortizations of actuarial net loss
0.5

 
0.4

 
0.9

 
0.9

Net periodic pension cost (benefit)
$
0.5

 
$
(0.1
)
 
$
0.8

 
$
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