Other Financial Information - Schedule of Other (Income) Expenses, Net (Detail) - 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]
Equity loss	$ 13	$ 19	$ 41	$ 24
Foreign currency (gains) losses, net	(6)	(6)	(20)	75
Net (gain) loss from asset sales	(1)	1	4	18
Gain from sale of investments	(786)	0	(789)	0
Mark-to-market gain on noncurrent marketable securities	(267)	0	(267)	0
Net loss (gain) on mark-to-market derivative instruments	21	10	(96)	(39)
Non-service costs - pension and other postretirement benefits	7	4	20	12
Other, net	(15)	(16)	(65)	(41)
Other expenses, net	$ (1,034)	$ 12	$ (1,172)	$ 49