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Other Income/(Loss) (Notes)
3 Months Ended
Mar. 31, 2024
Other Income and Expenses [Abstract]  
OTHER INCOME/(LOSS) OTHER INCOME/(LOSS)
The amounts included in Other income/(loss), net for the periods ended March 31 were as follows (in millions):
First Quarter
 20232024
Net periodic pension and OPEB income/(cost), excluding service cost (Note 11)
$(165)$(24)
Investment-related interest income348 410 
Interest income/(expense) on income taxes
(4)(14)
Realized and unrealized gains/(losses) on cash equivalents, marketable securities, and other investments(51)(29)
Gains/(Losses) on changes in investments in affiliates4 7 
Royalty income103 124 
Other(11)24 
Total$224 $498