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Pensions and Other Postretirement Benefits (Tables)
 3 Months Ended
Mar. 31, 2016
Compensation and Retirement Disclosure [Abstract]  
Schedule of pension and postretirement expenses
The pension and postretirement expenses related to the Company’s plans consisted of the following:

 
Pension Benefits
 
Post Retirement Health Care Benefits
 
Three Months Ended
 
 
Three Months Ended
 
March 31,
 
 
March 31,
In millions
2016
 
2015
 
 
2016
 
2015
 
Components of Net Periodic Cost:
 
 
 
 
 
 
 
 
 
Service Cost
$
2.5

 
$
3.8

 
 
$
0.2

 
$
0.2

 
Interest Cost
11.1

 
13.4

 
 
0.3

 
0.4

 
Administrative Expenses
0.3

 
0.2

 
 
—

 
—

 
Expected Return on Plan Assets
(15.1
)
 
(18.5
)
 
 
—

 
—

 
Amortization:
 
 
 
 
 
 
 
 
 
 Prior Service Cost (Credit)
0.2

 
0.2

 
 
(0.1
)
 
(0.1
)
 
Actuarial Loss (Gain)
4.8

 
5.5

 
 
(0.5
)
 
(0.4
)
 
Net Periodic Cost
$
3.8

 
$
4.6

 
 
$
(0.1
)
 
$
0.1