CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME/(LOSS) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Comprehensive Income [Abstract]
Net Earnings/(Loss)	$ 7,014	$ (8,995)	$ 3,460
Other Comprehensive Income/(Loss), net of taxes and reclassifications to earnings:
Derivatives qualifying as cash flow hedges	415	(256)	(32)
Pension and postretirement benefits	206	(75)	1,203
Marketable debt securities	(9)	5	36
Foreign currency translation	(41)	7	35
Total Other Comprehensive Income/(Loss)	571	(319)	1,242
Comprehensive Income/(Loss)	7,585	(9,314)	4,702
Comprehensive Income Attributable to Noncontrolling Interest	20	20	21
Comprehensive Income/(Loss) Attributable to BMS	$ 7,565	$ (9,334)	$ 4,681