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Pension and Other Postretirement Benefits
 9 Months Ended
Mar. 31, 2015
Compensation and Retirement Disclosure [Abstract]  
Pension and Other Postretirement Benefits
Pension and Other Postretirement Benefits
 
The components of the net periodic benefit cost related to the Company’s pension and other postretirement benefits for the three and nine months ended March 31, 2015 and 2014 were as follows:
 
Three months ended March 31,
 
Pension Plans
 
Other Postretirement Plans
($ in millions)
 
2015
 
2014
 
2015
 
2014
Service cost
 
$
8.0

 
$
8.0

 
$
1.1

 
$
1.0

Interest cost
 
13.5

 
14.3

 
3.0

 
3.1

Expected return on plan assets
 
(17.2
)
 
(15.7
)
 
(1.7
)
 
(1.6
)
Amortization of net loss
 
4.2

 
5.5

 
0.5

 
0.3

Amortization of prior service cost
 
0.1

 
0.1

 
—

 
—

 
 
$
8.6

 
$
12.2

 
$
2.9

 
$
2.8

Nine months ended March 31,
 
Pension Plans
 
Other Postretirement Plans
($ in millions)
 
2015
 
2014
 
2015
 
2014
Service cost
 
$
24.0

 
$
24.2

 
$
3.3

 
$
3.0

Interest cost
 
40.5

 
43.0

 
9.0

 
9.3

Expected return on plan assets
 
(51.6
)
 
(47.1
)
 
(5.0
)
 
(4.8
)
Amortization of net loss
 
12.6

 
16.3

 
1.5

 
0.9

Amortization of prior service cost
 
0.3

 
0.4

 
—

 
—

 
 
$
25.8

 
$
36.8

 
$
8.8

 
$
8.4



Historically, the Company capitalized in inventory only the service cost portion of periodic benefit costs associated with manufacturing employees. During the three months ended December 31, 2013, the Company began to capitalize the portion of periodic benefit costs related to the interest cost, expected return on assets and amortization of net actuarial loss and prior service cost (benefit), which the Company refers to as pension earnings, interest and deferrals (“pension EID”), related to current manufacturing employees in inventory. The impact of this change resulted in an increase in the amount of capitalized periodic benefit costs of $2.2 million during the nine months ended March 31, 2014. This change did not have a material impact on any previously reported amounts.
 
During the nine months ended March 31, 2015 and 2014, the Company made $5.5 million and $4.6 million, respectively, of contributions to its qualified defined benefit pension plans. The Company currently expects to make approximately $1.7 million of contributions to its qualified defined benefit pension plans during the remainder of fiscal year 2015.