Segment and Revenue Information - Schedule of Segment, Reconciliation of Other Items from Segments to Consolidated (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Segment Reporting Information [Line Items]
Share-based plans			$ (343)	$ (310)
Research and development expense, net	$ (897)	$ (1,154)	(2,651)	(2,976)
Unallocated items, eliminations and other
Segment Reporting Information [Line Items]
Share-based plans	11	65	(40)	118
Deferred compensation	(70)	(51)	(150)	(100)
Amortization of previously capitalized interest	(22)	(24)	(64)	(70)
Research and development expense, net	(102)	(105)	(285)	(293)
Eliminations and other unallocated items	(565)	(303)	(1,606)	(1,019)
Unallocated items, eliminations and other	$ (748)	$ (418)	$ (2,145)	$ (1,364)