RESTRUCTURING RESTRUCTURING AND RELATED COSTS TABLE (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 160	$ 12
Business Combination, Integration Related Costs	174	22
Operating Model 2020 [Member]
Restructuring Cost and Reserve [Line Items]
Severance Costs	3	4
Other Restructuring Costs	7	8
Restructuring Charges	10	12
Restructuring and Related Cost, Accelerated Depreciation	30	31
Restructuring Related Costs, Asset Impairments	42	1
Restructuring Costs and Asset Impairment Charges	82	44
Operating Model 2020 [Member] | Cost of Sales [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs and Asset Impairment Charges	16	12
Operating Model 2020 [Member] | Selling, General and Administrative Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs and Asset Impairment Charges	0	1
Operating Model 2020 [Member] | Research and Development Expense [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs and Asset Impairment Charges	56	19
Operating Model 2020 [Member] | Other Nonoperating Income (Expense) [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs and Asset Impairment Charges	10	$ 12
Celgene Integration [Member]
Restructuring Cost and Reserve [Line Items]
Severance Costs	146
Other Restructuring Costs	4
Restructuring Charges	150
Business Combination, Integration Related Costs	174
Celgene Integration [Member] | Other Nonoperating Income (Expense) [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs and Asset Impairment Charges	$ 324