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Pensions and Other Postretirement Benefits
 9 Months Ended
Sep. 30, 2019
Retirement Benefits [Abstract]  
Pensions and Other Postretirement Benefits Pensions and Other Postretirement Benefits

Three Months Ended September 30, 2019

Three Months Ended September 30, 2018

Pension Benefits
 
Global OPEB Plans
 
Pension Benefits
 
Global OPEB Plans

U.S.
 
Non-U.S.
 
 
U.S.
 
Non-U.S.
 
Service cost
$
99


$
38


$
4


$
83


$
33


$
5

Interest cost
566


148


54


513


112


49

Expected return on plan assets
(871
)

(240
)

—


(972
)

(201
)

—

Amortization of prior service cost (credit)
(1
)

2


(3
)

(1
)

1


(4
)
Amortization of net actuarial losses
2


31


7


2


35


14

Curtailments, settlements and other
—


119


—


—


18


—

Net periodic pension and OPEB (income) expense
$
(205
)
 
$
98

 
$
62

 
$
(375
)
 
$
(2
)

$
64


 
Nine Months Ended September 30, 2019
 
Nine Months Ended September 30, 2018
 
Pension Benefits
 
Global OPEB Plans
 
Pension Benefits
 
Global OPEB Plans
 
U.S.
 
Non-U.S.
 
 
U.S.
 
Non-U.S.
 
Service cost
$
295


$
102


$
12


$
248


$
138


$
15

Interest cost
1,698


386


163


1,538


349


147

Expected return on plan assets
(2,610
)

(627
)

—


(2,917
)

(621
)

—

Amortization of prior service cost (credit)
(3
)

4


(10
)

(3
)

3


(11
)
Amortization of net actuarial losses
8


90


22


7


109


40

Curtailments, settlements and other
—


119


—


—


18


—

Net periodic pension and OPEB (income) expense
$
(612
)
 
$
74

 
$
187

 
$
(1,127
)
 
$
(4
)
 
$
191



The curtailment and other charges recorded were primarily due to remeasurement of the General Motors Canada Company hourly pension plan as a result of transformation activities in the three and nine months ended September 30, 2019. Refer to Note 15 for additional information on transformation-related charges.

The non-service cost components of net periodic pension and other postretirement benefits (OPEB) income of $125 million and $401 million in the three months ended September 30, 2019 and 2018 and $587 million and $1.2 billion in the nine months ended September 30, 2019 and 2018 are presented in Interest income and other non-operating income, net.