CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME/(LOSS) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Statement of Comprehensive Income [Abstract]
Net earnings/(loss)	$ 2,195	$ 1,215	$ 5,970	$ (9,009)
Other comprehensive income/(loss), net of taxes and reclassifications to earnings:
Derivatives qualifying as cash flow hedges	48	(178)	(395)	67
Pension and postretirement benefits	19	100	22	49
Marketable debt securities	0	5	2	3
Foreign currency translation	(26)	61	96	(41)
Total other comprehensive income/(loss)	41	(12)	(275)	78
Comprehensive income/(loss)	2,236	1,203	5,695	(8,931)
Comprehensive income/(loss) attributable to noncontrolling interest	(6)	4	3	11
Comprehensive income/(loss) attributable to BMS	$ 2,242	$ 1,199	$ 5,692	$ (8,942)