CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS)/INCOME - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
Net (loss)/earnings	$ (11,908)	$ 2,267
Other comprehensive income/(loss), net of taxes and reclassifications to earnings:
Derivatives qualifying as cash flow hedges	191	(124)
Pension and postretirement benefits	13	0
Marketable debt securities	(2)	0
Foreign currency translation	(56)	37
Total Other comprehensive income/(loss)	146	(87)
Comprehensive (loss)/income	(11,762)	2,180
Comprehensive income attributable to noncontrolling interest	3	5
Comprehensive (loss)/income attributable to BMS	$ (11,765)	$ 2,175