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Employee Retirement Benefit Plans
 6 Months Ended
Dec. 31, 2016
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]  
Employee Retirement Benefit Plans
EMPLOYEE RETIREMENT BENEFIT PLANS
Components of the Company’s net periodic benefit costs are as follows:
 
Three Months Ended  
 December 31,
 
Six Months Ended  
 December 31,
(Dollars in millions)
2016
 
2015
 
2016
 
2015
Components of net periodic benefit cost:
 
 
 
 
 
 
 
Service cost
$
0.8

 
$
0.7

 
$
1.6

 
$
1.4

Interest cost
1.6

 
2.7

 
3.3

 
5.4

Expected return on plan assets
(2.6
)
 
(2.5
)
 
(5.4
)
 
(5.1
)
Amortization (1)
1.0

 
0.7

 
2.1

 
1.4

Net amount recognized
$
0.8

 
$
1.6

 
$
1.6

 
$
3.1

(1)
Amount represents the amortization of unrecognized actuarial gains/(losses).
As previously disclosed with regard to the Company’s participation in a multi-employer pension plan, the Company notified the plan trustees of its withdrawal from such plan in fiscal 2012. The actuarial review process, which is administered by the plan trustees, was completed during the third quarter of fiscal 2015. The liability reported reflects the present value of the Company's expected future long-term obligations. The estimated discounted value of the projected contributions related to these plans is $39.1 million as of December 31, 2016 and $39.3 million as of June 30, 2016 and is included within pension liability on the consolidated balance sheets. The annual cash impact associated with the Company's obligation in the multi-employer pension plan approximates $1.7 million per year.