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Employee Benefits (Tables)
3 Months Ended
Mar. 31, 2017
Compensation and Retirement Disclosure [Abstract]  
Schedule of Costs of Retirement Plans [Table Text Block]
The following table presents the components of our Company-sponsored pension costs for the three months ended March 31:
 
 
Three Months
(in millions)
2017
 
2016
Service cost
$
1.3

 
$
1.6

Interest cost
12.8

 
14.0

Expected return on plan assets
(14.8
)
 
(14.1
)
Amortization of net pension loss
3.9

 
3.4

Total periodic pension cost
$
3.2

 
$
4.9