EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Earnings Per Share [Abstract]
Net Earnings Attributable to BMS Used for Basic and Diluted EPS Calculation	$ 1,278	$ 2,021
Weighted-average common shares outstanding - basic (in shares)	2,146	2,236
Incremental shares attributable to share-based compensation plans (in shares)	18	29
Weighted-average common shares outstanding - diluted (in shares)	2,164	2,265
Earnings per common share attributable to BMS, basic (in usd per share)	$ 0.60	$ 0.90
Earnings per common share attributable to BMS, diluted (in usd per share)	$ 0.59	$ 0.89