CONSOLIDATED STATEMENTS OF EARNINGS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020		Dec. 31, 2019		Dec. 31, 2018
Revenues	$ 42,518		$ 26,145		$ 22,561
Cost of products sold	11,773	[1]	8,078	[1]	6,467
Marketing, selling and administrative	7,661		4,871		4,551
Research and development	11,143		6,148		6,332
MyoKardia Asset Acquisition IPRD Charge	11,438		0		0
Amortization of Acquired Intangible Assets	9,688		1,135		97
Other (income)/expense, net	(2,314)		938		(854)
Total Expenses	49,389		21,170		16,593
(Loss)/Earnings Before Income Taxes	(6,871)		4,975		5,968
Provision for Income Taxes	2,124		1,515		1,021
Net (Loss)/Earnings	(8,995)		3,460		4,947
Noncontrolling Interest	20		21		27
Net (Loss)/Earnings Attributable to BMS	$ (9,015)		$ 3,439		$ 4,920
Basic Earnings Per Common Share Attributable to BMS	$ (3.99)		$ 2.02		$ 3.01
Diluted Earnings per Common Share Attributable to BMS	$ (3.99)		$ 2.01		$ 3.01
Net product sales [Member]
Revenues	$ 41,321		$ 25,174		$ 21,581
Alliance and other revenues [Member]
Revenues	$ 1,197		$ 971		$ 980

[1] Excludes amortization of acquired intangible assets.