EARNINGS PER SHARE (Details) (USD $) In Millions, except Per Share data	3 Months Ended	6 Months Ended
Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Earnings Per Share [Abstract]
Net Earnings Attributable to BMS	$ 902	$ 927	$ 1,888	$ 1,670
Earnings attributable to unvested restricted shares	(2)	(3)	(4)	(7)
Net Earnings Attributable to BMS common shareholders	$ 900	$ 924	$ 1,884	$ 1,663
Earnings per share - basic	$ 0.53	$ 0.54	$ 1.11	$ 0.97
Weighted-average common shares outstanding - basic	1,707	1,718	1,705	1,717
Contingently convertible debt common stock equivalents	1	1	1	1
Incremental shares attributable to share-based compensation plans	14	9	12	9
Weighted-average common shares outstanding - diluted	1,722	1,728	1,718	1,727
Earnings per share - diluted	$ 0.52	$ 0.53	$ 1.10	$ 0.96
Anti-dilutive weighted-average equivalent shares - stock incentive plans	27	64	39	66

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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