CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net Earnings	$ 1,878	$ 1,366	$ 1,032	$ 4,520
Derivatives qualifying as cash flow hedges	(132)	38	(121)	24
Pension and postretirement benefits	(4)	1,116	5	1,204
Available-for-sale debt securities	(2)	4	7	43
Foreign currency translation	(5)	0	(70)	28
Other Comprehensive (Loss)/Income	(143)	1,158	(179)	1,299
Comprehensive Income	1,735	2,524	853	5,819
Comprehensive Income Attributable to Noncontrolling Interest	6	13	20	25
Comprehensive Income Attributable to BMS	$ 1,729	$ 2,511	$ 833	$ 5,794