EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Earnings Per Share [Abstract]
Net earnings attributable to BMS	$ 2,073	$ 1,421	$ 4,335	$ 2,699
Weighted-average common shares outstanding - basic (in shares)	2,093	2,133	2,096	2,140
Incremental shares attributable to share-based compensation plans (in shares)	9	16	11	17
Weighted-average common shares outstanding - diluted (in shares)	2,102	2,149	2,107	2,157
Earnings per common share
Earnings per common share, basic (in usd per share)	$ 0.99	$ 0.67	$ 2.07	$ 1.26
Earnings per common share, diluted (in usd per share)	$ 0.99	$ 0.66	$ 2.06	$ 1.25