EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Earnings Per Share [Abstract]
Net earnings attributable to BMS used for Basic and Diluted EPS Calculation	$ 1,353	$ 1,901	$ 4,495	$ 3,760
Weighted-average common shares outstanding - basic	1,632	1,632	1,634	1,633
Incremental shares attributable to share-based compensation plans	2	4	2	4
Weighted-average common shares outstanding - diluted	1,634	1,636	1,636	1,637
Earnings Per Share, Basic	$ 0.83	$ 1.16	$ 2.75	$ 2.30
Earnings Per Share, Diluted	$ 0.83	$ 1.16	$ 2.75	$ 2.30