EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Earnings Per Share [Abstract]
Net earnings attributable to BMS used for Basic and Diluted EPS Calculation	$ 1,432	$ 373	$ 3,142	$ 1,859
Weighted-average common shares outstanding - basic	1,636	1,633	1,635	1,633
Incremental shares attributable to share-based compensation plans	1	3	2	5
Weighted-average common shares outstanding - diluted	1,637	1,636	1,637	1,638
Earnings Per Share, Basic	$ 0.88	$ 0.23	$ 1.92	$ 1.14
Earnings Per Share, Diluted	$ 0.87	$ 0.23	$ 1.92	$ 1.13