v2.4.0.8
Pension And Other Postretirement Benefits (Tables)
 6 Months Ended
Jun. 30, 2013
Pension and Other Postretirement Benefit Expense [Abstract]  
Components Of The Plans' Net Periodic Benefits Cost
The following tables provide the components of the plans’ net periodic benefits cost for the three and six months ended June 30, 2013 and 2012:
 

Pension Benefits
 
Other Postretirement
Benefits
Three Months Ended June 30, (in millions)
2013
 
2012
 
2013
 
2012
Components of Net Periodic Benefit Cost
 
 
 
 
 
 
 
Service cost
$
9.3

 
$
9.4

 
$
3.0

 
$
2.8

Interest cost
24.3

 
28.2

 
8.1

 
9.3

Expected return on assets
(42.1
)
 
(41.1
)
 
(7.6
)
 
(6.7
)
Amortization of transition obligation
—

 
—

 
0.1

 
0.3

Amortization of prior service cost
0.1

 
0.1

 
(0.2
)
 
(0.1
)
Recognized actuarial loss
19.7

 
20.3

 
2.8

 
2.4

Settlement loss
3.6

 
—

 
—

 
—

Total Net Periodic Benefit Costs
$
14.9

 
$
16.9

 
$
6.2

 
$
8.0

 
 
Pension Benefits
 
Other Postretirement
Benefits
Six Months Ended June 30, (in millions)
2013
 
2012
 
2013
 
2012
Components of Net Periodic Benefit Cost
 
 
 
 
 
 
 
Service cost
$
18.7

 
$
18.8

 
$
6.0

 
$
5.6

Interest cost
48.6

 
56.4

 
16.2

 
18.6

Expected return on assets
(84.5
)
 
(82.2
)
 
(15.2
)
 
(13.4
)
Amortization of transition obligation
—

 
—

 
0.2

 
0.6

Amortization of prior service cost
0.2

 
0.2

 
(0.4
)
 
(0.2
)
Recognized actuarial loss
40.4

 
40.6

 
5.6

 
4.8

Settlement loss
24.3

 
—

 
—

 
—

Total Net Periodic Benefit Costs
$
47.7

 
$
33.8

 
$
12.4

 
$
16.0
Schedule of Assumptions Used
The following table provides the key assumptions that were used to calculate the pension benefit obligation and the net periodic benefit cost at the measurement dates of May 31, 2013, February 28, 2013 and December 31, 2012:

 
May 31, 2013
 
February 28, 2013
 
December 31, 2012
Actuarial Assumptions
 
 
 
 
 
Discount Rate
3.75
%
 
3.50
%
 
3.63
%
Expected return on assets
8.30
%
 
8.30
%
 
8.30
%