EARNINGS PER SHARE (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Earnings Per Share [Abstract]
Net Earnings Attributable to BMS	$ 726	$ 692	$ 536	$ 609	$ 925	$ (711)	$ 645	$ 1,101	$ 2,563	$ 1,960	$ 3,709
Earnings attributable to unvested restricted shares										(1)	(8)
Net Earnings Attributable to BMS common shareholders									$ 2,563	$ 1,959	$ 3,701
Earnings/(Loss) per Share - Basic	$ 0.44	$ 0.42	$ 0.33	$ 0.37	$ 0.56	$ (0.43)	$ 0.38	$ 0.65	$ 1.56	$ 1.17	$ 2.18
Weighted-average common shares outstanding - basic									1,644	1,670	1,700
Contingently convertible debt common stock equivalents									1	1	1
Incremental shares attributable to share-based compensation plans									17	17	16
Weighted-average common shares outstanding - diluted									1,662	1,688	1,717
Earnings/(Loss) per Share - Diluted	$ 0.44	$ 0.42	$ 0.32	$ 0.37	$ 0.56	$ (0.43)	$ 0.38	$ 0.64	$ 1.54	$ 1.16	$ 2.16
Anti-dilutive weighted-average equivalent shares - stock incentive plans										2	13