RESTRUCTURING RESTRUCTURING AND RELATED COSTS TABLE (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 301	$ 131	$ 293
Business Combination, Integration Related Costs	415	0	0
Operating Model 2020 [Member]
Restructuring Cost and Reserve [Line Items]
Employee termination costs	17	87	267
Other Restructuring Costs	28	44	26
Restructuring Charges	45	131	293
Restructuring and Related Cost, Accelerated Depreciation	133	113	289
Restructuring Related Costs, Asset Impairments	127	16	241
Other shutdown costs	0	8	3
Total charges	305	268	826
Operating Model 2020 [Member] | Cost of products sold [Member]
Restructuring Cost and Reserve [Line Items]
Total charges	180	57	149
Operating Model 2020 [Member] | Selling, General and Administrative Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Total charges	1	1	1
Operating Model 2020 [Member] | Research and development [Member]
Restructuring Cost and Reserve [Line Items]
Total charges	79	79	383
Operating Model 2020 [Member] | Other (income)/expense [Member]
Restructuring Cost and Reserve [Line Items]
Total charges	45	$ 131	$ 293
Celgene Integration [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	256
Business Combination, Integration Related Costs	415
Restructuring Related Costs, Asset Impairments	3
Total charges	674
Celgene Integration [Member] | Research and development [Member]
Restructuring Cost and Reserve [Line Items]
Total charges	3
Celgene Integration [Member] | Other (income)/expense [Member]
Restructuring Cost and Reserve [Line Items]
Total charges	$ 671