OTHER INCOME/(LOSS) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Other Income and Expenses [Abstract]
Net periodic pension and OPEB income/(cost), excluding service cost (Note 11)	$ 19	$ (347)	$ 44	$ (266)
Investment-related interest income	379	367	1,098	1,144
Interest income/(expense) on income taxes	(7)	(1)	(23)	(24)
Realized and unrealized gains/(losses) on cash equivalents, marketable securities, and other investments	20	(17)	63	(25)
Gains/(Losses) on changes in investments in affiliates	0	66	8	90
Royalty income	121	123	335	360
Other	28	(77)	108	(39)
Total	$ 560	$ 114	$ 1,633	$ 1,240