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Pension and Other Benefits
 3 Months Ended
Mar. 31, 2017
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 months ended March 31, 2017 and 2016 (in millions):
 
 
Pension Benefits
Other Benefits
 
2017

2016

2017

2016

Three Months Ended March 31,
 

 

 

 

Service cost
$
1.5

$
3.5

$
—

$
—

Interest cost
9.2

10.5

0.3

0.3

Expected return on plan assets
(8.5
)
(11.0
)
—

—

Amortization of prior service cost
—

—

(0.2
)
(0.2
)
Amortization of actuarial losses
2.8

3.5

—

—

NET PERIODIC BENEFIT COST
$
5.0

$
6.5

$
0.1

$
0.1


 
Employer Contributions
 
Although not required by ERISA and the Internal Revenue Code, the Company may elect to make a voluntary contribution to its qualified domestic defined benefit pension plan in 2017. The Company anticipates making required contributions of approximately $1.7 million to its foreign pension plans during 2017, of which $0.4 million has been contributed through March 31, 2017.