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Postemployment Benefits (Tables)
 12 Months Ended
Dec. 31, 2014
Postemployment Benefits [Abstract]  
Schedule of Net Benefit Costs
Components of the net cost (benefit) for these plans were as follows for the years ended December 31 (in millions):
 
Health and Welfare
 
Postemployment Benefits
 
2014
 
2013
 
2012
 
2014
 
2013
 
2012
Service cost
$
0.1

 
$
0.1

 
$
0.1

 
$
0.8

 
$
0.9

 
$
0.9

Interest cost
0.2

 
0.2

 
0.2

 
1.0

 
0.9

 
0.8

Actuarial (gain) loss (i)
0.9

 
(0.9
)
 
0.1

 
3.8

 
(1.0
)
 
3.1

Foreign currency (gain) loss
—

 
—

 
—

 
(1.5
)
 
(0.1
)
 
0.6

Prior service credit (ii)
(0.2
)
 
(0.2
)
 
(0.2
)
 
—

 
—

 
—

Net periodic cost (benefit) recognized
$
1.0

 
$
(0.8
)
 
$
0.2

 
$
4.1

 
$
0.7

 
$
5.4

_____________________
(i)
Net benefit costs above do not include a component for the amortization of actuarial gains or losses as the Company’s policy is to recognize such gains and losses immediately.
(ii)
During 2005, the Company revised its medical plan to exclude prescription drug coverage available under Medicare part D. This negative plan amendment generated an unrecognized prior service benefit of $2.3 million which is being amortized over the estimated remaining life of the affected participants of 9.5 years.
Schedule Of Changes In Projected Benefit Obligation And Plan Assets
The following table reconciles the change in the benefit obligation, fair value of plan assets and the accrued benefit cost as of and for each of the years ended December 31 (in millions):
 
Health and Welfare
 
Postemployment Benefits
 
2014
 
2013
 
2014
 
2013
Benefit obligation at beginning of year
$
5.5

 
$
6.5

 
$
12.8

 
$
13.2

Service cost
0.1

 
0.1

 
0.8

 
0.9

Interest cost
0.2

 
0.2

 
1.0

 
0.9

Actuarial (gain) loss
0.9

 
(0.9
)
 
3.8

 
(1.0
)
Foreign currency (gain) loss
—

 
—

 
(1.5
)
 
(0.1
)
Benefits paid, net of retiree contributions
(0.4
)
 
(0.4
)
 
(0.8
)
 
(1.1
)
Benefit obligation at end of year
$
6.3

 
$
5.5

 
$
16.1

 
$
12.8
Schedule of Assumptions Used
Weighted-average assumptions used to determine benefit obligations were as follows for the years ended December 31:
 
Health and Welfare
 
Postemployment Benefits
 
2014
 
2013
 
2014
 
2013
Discount rate
3.75
%
 
4.50
%
 
8.00
%
 
8.25
%
Rate of compensation increase
n/a

 
n/a

 
4.50
%
 
4.50
%
Weighted-average assumptions used to determine net benefit cost for the periods were as follows for the years ended December 31:
 
Health and Welfare
 
Postemployment Benefits
 
2014
 
2013
 
2014
 
2013
Discount rate
4.50
%
 
3.50
%
 
8.25
%
 
6.75
%
Rate of compensation increase
n/a

 
n/a

 
4.50
%
 
4.50
%
The following table presents the assumed health care cost trends:
 
2014
 
2013
 
2012
Health care trend rate for next year
6.50
%
 
6.50
%
 
8.00
%
Ultimate trend rate
5.00
%
 
5.00
%
 
5.00
%
Year that rate reaches ultimate rate
2021

 
2023

 
2029
Schedule of Expected Benefit Payments
The following table presents benefit payments expected to be paid, which reflect expected future service, as appropriate, for each of the next five years and the aggregate five years thereafter (in millions):
Year
Health and
Welfare
 
Postemployment
Benefits
2015
$
0.5

 
$
1.0

2016
0.5

 
1.0

2017
0.5

 
1.1

2018
0.4

 
1.3

2019
0.3

 
1.4

2020-2024
1.7

 
8.9