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Pension Plans and Other Postretirement Benefits
 3 Months Ended
Mar. 31, 2017
Compensation and Retirement Disclosure [Abstract]  
Pension Plans and Other Postretirement Benefits
12. Pension Plans and Other Postretirement Benefits

The Company has contributory and non-contributory defined-benefit pension plans, which include both qualified and supplemental plans. The Company also provides certain health care and life insurance benefits for certain retired employees. Retiree health care benefits are funded by contributions from the retiree and, in certain circumstances, contributions from the Company. The Company’s retiree life insurance plan is noncontributory. The following summarizes the Company’s pension and other postretirement benefit cost:
 
Pension Benefits
 
Other Benefits
millions
2017
 
2016
 
2017
 
2016
Three Months Ended March 31
 
 
 
 
 
 
 
Service cost
$
21

 
$
26

 
$
—

 
$
1

Interest cost
21

 
26

 
3

 
3

Expected (return) loss on plan assets
(21
)
 
(27
)
 
—

 
—

Amortization of net actuarial loss (gain)
6

 
8

 
—

 
—

Amortization of net prior service cost (credit)
—

 
—

 
(6
)
 
(6
)
Settlement expense
3

 
—

 
—

 
—

Termination benefits expense (1)
4

 
44

 
—

 
—

Curtailment expense (1)
—

 
8

 
—

 
(3
)
Net periodic benefit cost
$
34

 
$
85

 
$
(3
)
 
$
(5
)

__________________________________________________________________
(1) 
Termination benefits expense and curtailment expense for the three months ended March 31, 2016, relate to the workforce reduction program initiated in the first quarter of 2016. See Note 11—Restructuring Charges.

The Company contributed $60 million during the three months ended March 31, 2017, and expects to contribute an additional $107 million to funded pension plans during 2017.