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Employee Benefits (Tables)
 9 Months Ended
Sep. 30, 2013
Compensation and Retirement Disclosure [Abstract]  
Schedule of (Income) Charges Related to Benefit Plans
The following table presents the components of net periodic pension benefit income for the VEBAs and charges relating to all other employee benefit plans for the quarter and nine months ended September 30, 2013 and September 30, 2012:
 
Quarter Ended
 
Nine Months Ended
 
September 30,
 
September 30,
 
2013
 
2012
 
2013
 
2012
VEBAs:
 
 
 
 
 
 
 
Service cost
$
0.6

 
$
0.9

 
$
1.9

 
$
2.6

Interest cost
3.6

 
4.4

 
10.9

 
13.4

Expected return on plan assets
(11.1
)
 
(10.0
)
 
(33.8
)
 
(30.3
)
Amortization of prior service cost
1.0

 
1.0

 
3.1

 
3.1

Amortization of net actuarial loss
0.3

 
0.8

 
1.0

 
2.3

Total net periodic pension benefit income relating to VEBAs
(5.6
)
 
(2.9
)
 
(16.9
)
 
(8.9
)
Deferred compensation plan
0.4

 
0.3

 
0.8

 
0.8

Defined contribution plans
1.3

 
1.3

 
6.6

 
6.3

Multiemployer pension plans
0.9

 
0.9

 
2.6

 
2.6

Total
$
(3.0
)
 
$
(0.4
)
 
$
(6.9
)
 
$
0.8
Allocation of (Income) Charges Relating to Benefit Plans by Segment
The following table presents the allocation of the (income) charges detailed above, by segment (see Note 12):
 
Quarter Ended
 
Nine Months Ended
 
September 30,
 
September 30,
 
2013
 
2012
 
2013
 
2012
Fabricated Products
$
2.2

 
$
2.1

 
$
8.8

 
$
8.5

All Other
(5.2
)
 
(2.5
)
 
(15.7
)
 
(7.7
)
Total
$
(3.0
)
 
$
(0.4
)
 
$
(6.9
)
 
$
0.8