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Pension and Post-retirement Benefit Plans Pension and Post-retirement Benefit Plans (Tables)
 9 Months Ended
Sep. 30, 2013
Compensation and Retirement Disclosure [Abstract]  
Components of net periodic benefit cost
The components of net periodic benefit cost were as follows (in millions):

 
For the Three Months Ended September 30,
 
2013
 
2012
 
2013
 
2012
 
Pension Benefits
 
Other Benefits
Service cost
$
1.3

 
$
1.4

 
$
—

 
$
—

Interest cost
4.0

 
4.3

 
—

 
0.1

Expected return on plan assets
(5.1
)
 
(4.7
)
 
—

 
—

Amortization of prior service cost
0.1

 
0.1

 
(0.7
)
 
(0.8
)
Recognized actuarial loss
2.3

 
2.1

 
0.4

 
0.4

Settlements and curtailments
0.1

 
1.0

 
—

 
—

Net periodic benefit cost (1)
$
2.7

 
$
4.2

 
$
(0.3
)
 
$
(0.3
)

 
For the Nine Months Ended September 30,
 
2013
 
2012
 
2013
 
2012
 
Pension Benefits
 
Other Benefits
Service cost
$
3.9

 
$
4.1

 
$
—

 
$
0.2

Interest cost
12.3

 
12.9

 
0.1

 
0.4

Expected return on plan assets
(15.7
)
 
(14.1
)
 
—

 
—

Amortization of prior service cost
0.3

 
0.3

 
(2.2
)
 
(2.0
)
Recognized actuarial loss
6.9

 
6.5

 
1.1

 
1.0

Settlements and curtailments (2) 
1.3

 
7.3

 
—

 
—

Net periodic benefit cost (1)
$
9.0

 
$
17.0

 
$
(1.0
)
 
$
(0.4
)


(1) Pension Expense of $0.1 million and $0.2 million was included in Loss from discontinued operations for the three and nine months ended September 30, 2013, respectively. Pension expense of $0.6 million and $7.0 million was included in Loss from discontinued operations for the three and nine months ended September 30, 2012, respectively.