EARNINGS/(LOSS) PER SHARE (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Earnings Per Share [Abstract]
Net Earnings/(Loss) Attributable to BMS common shareholders	$ (130)	$ 333	$ 1,056	$ 1,270
Weighted-average common shares outstanding - basic	1,667	1,657	1,665	1,655
Contingently convertible debt common stock equivalents		1	1	1
Incremental shares attributable to share-based compensation plans		11	11	12
Weighted-average common shares outstanding - diluted	1,667	1,669	1,677	1,668
Earnings/(Loss) per share - basic	$ (0.08)	$ 0.20	$ 0.63	$ 0.77
Earnings/(Loss) per share - diluted	$ (0.08)	$ 0.20	$ 0.63	$ 0.76
Antidilutive securities excluded from computation of earnings per share, amount	10