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Other Income (Expense), Net (Tables)
 12 Months Ended
Dec. 31, 2023
Other Income and Expenses [Abstract]  
Computation of Other Income (Expense), Net

Other income (expense), net consists of the following (dollars in millions):

 

 

 

Years ended December 31,

 

 

 

2023

 

 

2022

 

 

2021

 

Post-retirement benefit plan amendment credits

 

$

9

 

 

$

9

 

 

$

10

 

Technology-related investments gain

 

 

3

 

 

 

6

 

 

 

4

 

Rabbi trust assets gain (loss)

 

 

3

 

 

 

(3

)

 

 

2

 

Loss on foreign exchange

 

 

(2

)

 

 

(13

)

 

 

(2

)

Unrealized (loss) gain on marketable securities

 

 

(1

)

 

 

(22

)

 

 

4

 

Other

 

 

3

 

 

 

2

 

 

 

1

 

Total

 

$

15

 

 

$

(21

)

 

$

19