CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS)/INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Statement of Comprehensive Income [Abstract]
Net (loss)/earnings	$ (8,933)	$ 8,040	$ 6,345
Other comprehensive income/(loss), net of taxes and reclassifications to earnings:
Derivatives qualifying as cash flow hedges	374	(230)	54
Pension and postretirement benefits	90	(115)	145
Marketable debt securities	0	2	(2)
Foreign currency translation	(156)	78	(210)
Total other comprehensive income/(loss)	308	(265)	(13)
Comprehensive (loss)/income	(8,625)	7,775	6,332
Comprehensive income attributable to noncontrolling interest	15	15	18
Comprehensive (loss)/income attributable to BMS	$ (8,640)	$ 7,760	$ 6,314