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PENSION AND POSTRETIREMENT PLANS (Tables)
 9 Months Ended
Sep. 30, 2013
Postemployment Benefits [Abstract]  
Schedule of Pensions and Postretirement Plans
The effect on operations of the post-retirement medical plan is shown in the following table:

 
Three Months Ended September 30,
 
Nine Months Ended
September 30,
 
2013
 
2012
 
2013
 
2012
Service cost for benefits earned
$
0.1

 
$
0.1

 
$
0.3

 
$
0.3

Interest cost on benefit obligation
0.6

 
0.6

 
1.9

 
1.8

Net amortization and deferral
0.2

 
0.1

 
0.7

 
0.1

Postretirement medical plan costs
$
0.9

 
$
0.8

 
$
2.9

 
$
2.2

The effect on operations for the Company Plan and the PEP is summarized as follows:

 
Three Months Ended September 30,
 
Nine Months Ended
September 30,
 
2013
 
2012
 
2013
 
2012
Service cost for benefits earned
$
0.7

 
$
0.6

 
$
1.9

 
$
1.8

Interest cost on benefit obligation
3.7

 
3.8

 
11.1

 
11.2

Expected return on plan assets
(4.3
)
 
(4.4
)
 
(12.9
)
 
(13.0
)
Net amortization and deferral
2.3

 
3.1

 
8.3

 
9.1

Defined benefit plan costs
$
2.4

 
$
3.1

 
$
8.4

 
$
9.1