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Pension and Other Post-Retirement Benefits
 9 Months Ended
Sep. 30, 2014
Compensation and Retirement Disclosure [Abstract]  
Pension and Other Post-Retirement Benefits
Pension and Other Post-Retirement Benefits

The following table shows components of our pension and other post-retirement benefits expense for the three months ended September 30, 2014 and 2013 (in millions):
 
2014 Pension
Benefits
 
2013 Pension
Benefits
 
2014 Retiree
Health
and Life
 
2013 Retiree
Health
and Life
Service cost
$
1.5

 
$
1.7

 
$
—

 
$
0.1

Interest cost
5.2

 
4.6

 
0.4

 
0.4

Expected return on plan assets
(7.1
)
 
(6.9
)
 
—

 
—

Amortization of (1):
 
 
 
 
 
 
 
Unrecognized prior service credit
(0.3
)
 
(0.3
)
 
—

 
—

Unrecognized net actuarial loss
2.8

 
3.7

 
—

 
—

Net expense
$
2.1

 
$
2.8

 
$
0.4

 
$
0.5


The following table shows components of our pension and other post-retirement benefits expense for the nine months ended September 30, 2014 and 2013 (in millions):
 
2014 Pension
Benefits
 
2013 Pension
Benefits
 
2014 Retiree
Health
and Life
 
2013 Retiree
Health
and Life
Service cost
$
4.5

 
$
5.1

 
$
0.1

 
$
0.2

Interest cost
15.6

 
13.8

 
1.2

 
1.2

Expected return on plan assets
(21.4
)
 
(20.7
)
 
—

 
—

Amortization of (1):
 
 
 
 
 
 
 
Unrecognized prior service credit
(0.8
)
 
(0.8
)
 
(0.1
)
 
(0.1
)
Unrecognized net actuarial loss (gain)
8.5

 
11.2

 
(0.1
)
 
—

Net expense
$
6.4

 
$
8.6

 
$
1.1

 
$
1.3

_________
(1) Amounts reclassified from accumulated other comprehensive loss.