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Other (Income) and Expense
 9 Months Ended
Sep. 30, 2024
Other Income and Expenses [Abstract]  
Other (Income) and Expense Other (Income) and Expense:
Components of other (income) and expense are as follows:
Three Months Ended September 30,Nine Months Ended September 30,
(Dollars in millions)2024202320242023
Other (income) and expense:
(Gains)/losses on foreign currency transactions (1)
$470 $(260)$126 $(338)
(Gains)/losses on derivative instruments (1)
(428)316 (1)315 
Interest income(170)(156)(597)(527)
Net (gains)/losses from securities and investment assets(4)(5)(14)3 
Retirement-related costs/(income) (2)
2,797 (12)2,991 (16)
Other (3)
(422)(97)(810)(158)
Total other (income) and expense$2,244 $(215)$1,694 $(721)
(1)The company uses financial hedging instruments to limit specific currency risks related to foreign currency-based transactions. The hedging program does not hedge 100 percent of currency exposures and defers, versus eliminates, the impact of currency. Refer to note 16, "Derivative Financial Instruments," for additional information on foreign exchange risk.
(2)2024 amounts include the impact of a one-time, non-cash, pre-tax pension settlement charge of $2.7 billion. Refer to note 18, "Retirement-Related Benefits," for additional information.
(3)2024 amounts include a pre-tax gain of $351 million from the sale of certain QRadar SaaS assets. The nine months ended September 30, 2024 also includes a pre-tax gain of $241 million from the divestiture of The Weather Company assets. Refer to note 5, "Acquisitions & Divestitures," for additional information.