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Pensions and Other Postretirement Benefits
 6 Months Ended
Jun. 30, 2019
Retirement Benefits [Abstract]  
Pensions and Other Postretirement Benefits Pensions and Other Postretirement Benefits

Three Months Ended June 30, 2019

Three Months Ended June 30, 2018

Pension Benefits
 
Global OPEB Plans
 
Pension Benefits
 
Global OPEB Plans

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


$
29


$
4


$
82


$
39


$
5

Interest cost
566


118


55


512


117


48

Expected return on plan assets
(871
)

(192
)

—


(972
)

(208
)

—

Amortization of prior service cost (credit)
(1
)

1


(4
)

(1
)

1


(3
)
Amortization of net actuarial losses
3


30


7


3


37


13

Net periodic pension and OPEB (income) expense
$
(205
)
 
$
(14
)
 
$
62

 
$
(376
)
 
$
(14
)

$
63


 
Six Months Ended June 30, 2019
 
Six Months Ended June 30, 2018
 
Pension Benefits
 
Global OPEB Plans
 
Pension Benefits
 
Global OPEB Plans
 
U.S.
 
Non-U.S.
 
 
U.S.
 
Non-U.S.
 
Service cost
$
196


$
64


$
8


$
165


$
105


$
10

Interest cost
1,132


238


109


1,025


237


98

Expected return on plan assets
(1,739
)

(387
)

—


(1,945
)

(420
)

—

Amortization of prior service cost (credit)
(2
)

2


(7
)

(2
)

2


(7
)
Amortization of net actuarial losses
6


59


15


5


74


26

Net periodic pension and OPEB (income) expense
$
(407
)
 
$
(24
)
 
$
125

 
$
(752
)
 
$
(2
)
 
$
127



The non-service cost components of net periodic pension and other postretirement benefits (OPEB) income of $232 million and $420 million in the three months ended June 30, 2019 and 2018 and $462 million and $841 million in the six months ended June 30, 2019 and 2018 are presented in Interest income and other non-operating income, net.