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Other (Income) Expense, Net
 3 Months Ended
Mar. 31, 2023
Other Income and Expenses [Abstract]  
Other (Income) Expense, Net Other (Income) Expense, Net
Other (income) expense, net, consisted of: 
 Three Months Ended
March 31,
($ in millions)20232022
Interest income$(112)$(7)
Interest expense242 243 
Exchange losses61 39 
(Income) loss from investments in equity securities, net (1)
(450)708 
Net periodic defined benefit plan (credit) cost other than service cost(115)(121)
Other, net463 (154)
 $89 $708 
(1)    Includes net realized and unrealized gains and losses from investments in equity securities either owned directly or through ownership interests in investment funds. Unrealized gains and losses from investments that are directly owned are determined at the end of the reporting period, while gains and losses from ownership interests in investment funds are accounted for on a one quarter lag.
Other, net (as reflected in the table above) in the first quarter of 2023 includes a $572.5 million charge related to settlements with certain plaintiffs in the Zetia antitrust litigation (see Note 8).
Interest paid for the three months ended March 31, 2023 and 2022 was $208 million and $211 million, respectively.