EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Earnings Per Share [Abstract]
Net earnings attributable to BMS	$ 2,262	$ 1,278
Weighted-average common shares outstanding - basic (in shares)	2,099	2,146
Incremental shares attributable to share-based compensation plans (in shares)	14	18
Weighted-average common shares outstanding - diluted (in shares)	2,113	2,164
Earnings per common share
Earnings per common share, basic (in usd per share)	$ 1.08	$ 0.60
Earnings per common share, diluted (in usd per share)	$ 1.07	$ 0.59