CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement of Comprehensive Income [Abstract]
Net Earnings/(Loss)	$ 1,061	$ (80)	$ 3,090	$ (846)
Derivatives qualifying as cash flow hedges	6	(59)	286	11
Pension and postretirement benefits	15	(7)	38	9
Available-for-sale debt securities	(2)	8	(4)	9
Foreign currency translation	7	51	1	(65)
Other Comprehensive Income/(Loss)	26	(7)	321	(36)
Comprehensive Income/(Loss)	1,087	(87)	3,411	(882)
Comprehensive Income Attributable to Noncontrolling Interest	6	5	14	14
Comprehensive Income/(Loss) Attributable to BMS	$ 1,081	$ (92)	$ 3,397	$ (896)