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Pension and Other Benefits
 6 Months Ended
Jun. 30, 2015
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]  
Pension And Other Benefits
Pension and Other Benefits
 
 
The following table sets forth the components of net pension and other benefit costs for the three and six months ended June 30, 2015 and 2014 (in millions):
 
 
Pension Benefits
Other Benefits
 
2015

2014

2015

2014

Three Months Ended June 30,
 

 

 

 

Service cost
$
4.5

$
3.8

$
—

$
—

Interest cost
10.1

10.2

0.3

0.4

Expected return on plan assets
(13.4
)
(11.3
)
—

—

Amortization of prior service cost
—

—

(0.3
)
(0.2
)
Amortization of actuarial losses/(gains)
3.0

0.9

—

(0.1
)
NET PERIODIC BENEFIT COST
$
4.2

$
3.6

$
—

$
0.1

Six Months Ended June 30,
 

 

 

 

Service cost
$
9.0

$
7.5

$
—

$
—

Interest cost
20.2

20.4

0.6

0.6

Expected return on plan assets
(26.6
)
(22.6
)
—

—

Amortization of prior service cost
—

0.1

(0.5
)
(0.4
)
Amortization of actuarial losses/(gains)
5.9

1.8

—

(0.1
)
NET PERIODIC BENEFIT COST
$
8.5

$
7.2

$
0.1

$
0.1


 
Employer Contributions
 
Although the Company is not required under the Pension Protection Act of 2006 to make any contributions to its qualified domestic benefit pension plans during 2015, the Company made a voluntary contribution to its qualified domestic defined benefit pension plan of $20 million in January 2015. We do not anticipate further contributions to the qualified domestic defined benefit pension plan in 2015. The Company anticipates making required contributions of approximately $2.8 million to its foreign pension plans during 2015, of which $1.7 million has been contributed through June 30, 2015.