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Retirement and Other Benefit Programs
 3 Months Ended
Mar. 31, 2017
Compensation and Retirement Disclosure [Abstract]  
Retirement and Other Benefit Programs
Retirement and Other Benefit Programs

The Company sponsors various pension and other post-employment benefit (“OPEB”) plans in the United States and other countries. Net periodic benefit cost associated with these plans for the three months ended March 31, 2017 is presented below.

 
Three months ended March 31, 2017
(In millions)
U.S. pensions
 
International pensions
 
OPEB (U.S.)
Net periodic benefit cost
 

 
 

 
 

Service cost
$
3.7

 
$
9.4

 
$
0.3

Interest cost
3.9

 
1.2

 
0.3

Expected return on plan assets
(4.0
)
 
(1.8
)
 
—

Net periodic benefit cost
$
3.6

 
$
8.8

 
$
0.6



The majority of the Company's pension and OPEB plans were assumed with the acquisition of Baxalta on June 3, 2016 and the Company did not report net periodic benefit cost associated with these plans during the three months ended March 31, 2016.