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POSTRETIREMENT BENEFIT PLANS (Tables)
 3 Months Ended
Mar. 31, 2014
Compensation and Retirement Disclosure [Abstract]  
Net Periodic Benefit Cost of Pension Plans and Other Employee Related Benefit Plans
The following tables provide the components of net periodic benefit cost for pension plans and other employee-related benefit plans for the three months ended March 31, 2014 and 2013. 
 
2014
 
2013
Three Months Ended March 31
Pension
 
Other
Benefits
 
Total
 
Pension
 
Other
Benefits
 
Total
Net periodic benefit cost:
 
 
 
 
 
 
 
 
 
 
 
Service cost
$
1.2

 
$
0.5

 
$
1.7

 
$
1.8

 
$
0.7

 
$
2.5

Interest cost
3.9

 
2.0

 
5.9

 
3.6

 
2.1

 
5.7

Expected return on plan assets
(5.2
)
 
(0.2
)
 
(5.4
)
 
(4.9
)
 
(0.1
)
 
(5.0
)
Amortization of prior service cost (benefit)
0.2

 
(1.5
)
 
(1.3
)
 
0.2

 
(0.1
)
 
0.1

Amortization of net actuarial loss
1.6

 
0.7

 
2.3

 
2.4

 
1.3

 
3.7

Net periodic benefit cost
$
1.7

 
$
1.5

 
$
3.2

 
$
3.1

 
$
3.9

 
$
7.0