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Employee Benefits (Tables)
 9 Months Ended
Sep. 30, 2014
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 and nine months ended September 30:
 
 
Three Months
 
Nine Months
(in millions)
2014
 
2013
 
2014
 
2013
Service cost
$
1.1

 
$
1.1

 
$
3.2

 
$
3.2

Interest cost
15.2

 
14.0

 
45.6

 
42.1

Expected return on plan assets
(13.4
)
 
(13.9
)
 
(40.2
)
 
(41.7
)
Amortization of net pension loss
3.2

 
3.7

 
9.6

 
11.1

Total periodic pension cost
$
6.1

 
$
4.9

 
$
18.2

 
$
14.7