EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Earnings Per Share [Abstract]
Net earnings attributable to BMS used for Basic and Diluted EPS Calculation	$ 373	$ 916	$ 1,859	$ 2,490
Weighted-average common shares outstanding - basic	1,633	1,644	1,633	1,653
Incremental shares attributable to share-based compensation plans	3	6	5	7
Weighted-average common shares outstanding - diluted	1,636	1,650	1,638	1,660
Earnings per share - basic	$ 0.23	$ 0.56	$ 1.14	$ 1.51
Earnings per share - diluted	$ 0.23	$ 0.56	$ 1.13	$ 1.50