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OTHER INCOME/(LOSS)
 9 Months Ended
Sep. 30, 2026
Other Income and Expenses [Abstract]  
OTHER INCOME/(LOSS) OTHER INCOME/(LOSS)
The amounts included in Other income/(loss), net for the periods ended September 30 were as follows (in millions):
Third QuarterFirst Nine Months
2025202620252026
Net periodic pension and OPEB income/(cost), excluding service cost (Note 11)
$19 $357 $44 $584 
Investment-related interest income379 329 1,098 938 
Interest income/(expense) on income taxes
(7)(8)(23)(20)
Realized and unrealized gains/(losses) on cash equivalents, marketable securities, and other investments20 (23)63 (19)
Royalty income121 91 335 300 
Other28 176 116 361 
Total$560 $922 $1,633 $2,144