CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement of Comprehensive Income [Abstract]
Net Earnings	$ 2,029	$ (766)
Derivatives qualifying as cash flow hedges	280	70
Pension and postretirement benefits	23	16
Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, after Tax	(2)	1
Foreign currency translation	(6)	(116)
Other Comprehensive (Loss)/Income	295	(29)
Comprehensive Income	2,324	(795)
Comprehensive Income Attributable to Noncontrolling Interest	8	9
Comprehensive Income Attributable to BMS	$ 2,316	$ (804)