EARNINGS/(LOSS) PER SHARE (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Earnings Per Share [Abstract]
Net Earnings/(Loss) Attributable to BMS Used for Basic and Diluted EPS Calculation	$ 6,994	$ (9,015)	$ 3,439
Weighted-average common shares outstanding - basic (in shares)	2,221	2,258	1,705
Incremental shares attributable to share-based compensation plans (in shares)	24	0	7
Weighted-average common shares outstanding - diluted (in shares)	2,245	2,258	1,712
Earnings/(Loss) per Common Share
Basic (in usd per share)	$ 3.15	$ (3.99)	$ 2.02
Diluted (in usd per share)	$ 3.12	$ (3.99)	$ 2.01
Antidilutive securities excluded from computation of earnings per share (in shares)		106