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Employee Benefit Plans
 9 Months Ended
Sep. 30, 2020
Retirement Benefits [Abstract]  
Employee Benefit Plans Employee Benefit Plans
The components of net periodic benefit cost, included in other operating expenses on the Company’s condensed consolidated statements of income, for the three and nine months ended September 30, 2020 and 2019 were as follows (dollars in millions):
 
 
Pension Benefits
 
Other Benefits
 
 
Three months ended September 30,
 
Three months ended September 30,
 
 
2020
 
2019
 
2020
 
2019
Service cost
 
$
4

 
$
3

 
$
1

 
$
—

Interest cost
 
1

 
2

 
—

 
1

Expected return on plan assets
 
(2
)
 
(2
)
 
—

 
—

Amortization of prior service cost (credit)
 
—

 
—

 
—

 
—

Amortization of prior actuarial losses
 
1

 
1

 
—

 
—

Net periodic benefit cost
 
$
4

 
$
4

 
$
1

 
$
1


 
 
Pension Benefits
 
Other Benefits
 
 
Nine months ended September 30,
 
Nine months ended September 30,
 
 
2020
 
2019
 
2020
 
2019
Service cost
 
$
11

 
$
9

 
$
2

 
$
2

Interest cost
 
4

 
5

 
2

 
2

Expected return on plan assets
 
(7
)
 
(5
)
 
—

 
—

Amortization of prior service cost (credit)
 
—

 
—

 
(1
)
 
(1
)
Amortization of prior actuarial losses
 
3

 
3

 
1

 
1

Net periodic benefit cost
 
$
11

 
$
12

 
$
4

 
$
4