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Pensions and Other Postretirement Benefits
 3 Months Ended
Mar. 31, 2019
Retirement Benefits [Abstract]  
Pensions and Other Postretirement Benefits
Pensions and Other Postretirement Benefits

Three Months Ended March 31, 2019

Three Months Ended March 31, 2018

Pension Benefits
 
Global OPEB Plans
 
Pension Benefits
 
Global OPEB Plans

U.S.
 
Non-U.S.
 
 
U.S.
 
Non-U.S.
 
Service cost
$
98


$
35


$
4


$
83


$
66


$
5

Interest cost
566


120


54


513


120


50

Expected return on plan assets
(868
)

(195
)

—


(973
)

(212
)

—

Amortization of prior service cost (credit)
(1
)

1


(3
)

(1
)

1


(4
)
Amortization of net actuarial losses
3


29


8


2


37


13

Net periodic pension and OPEB (income) expense
$
(202
)
 
$
(10
)
 
$
63

 
$
(376
)
 
$
12


$
64


 
 
 
 
 
 
 
 
 
 
 
 

The non-service cost components of net periodic pension and other postretirement benefits (OPEB) income of $230 million and $421 million in the three months ended March 31, 2019 and 2018 are presented in Interest income and other non-operating income, net.