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Employee Benefits (Tables)
3 Months Ended
Mar. 31, 2016
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)
 
2016
 
2015
Service cost
 
$
1.6

 
$
1.2

Interest cost
 
14.0

 
14.3

Expected return on plan assets
 
(14.1
)
 
(15.0
)
Amortization of net pension loss
 
3.4

 
4.0

Total periodic pension cost
 
$
4.9

 
$
4.5