EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Earnings Per Share [Abstract]
Net earnings attributable to BMS	$ 1,928	$ 1,606	$ 6,263	$ 4,305
Weighted-average common shares outstanding - basic (in shares)	2,057	2,133	2,083	2,137
Incremental shares attributable to share-based compensation plans (in shares)	7	15	10	17
Weighted-average common shares outstanding - diluted (in shares)	2,064	2,148	2,093	2,154
Earnings per common share
Earnings per common share, basic (in usd per share)	$ 0.94	$ 0.75	$ 3.01	$ 2.01
Earnings per common share, diluted (in usd per share)	$ 0.93	$ 0.75	$ 2.99	$ 2.00