ACQUISITIONS, DIVESTITURES AND LICENSING ARRANGEMENTS ASSET ACQUISITION (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
IFM [Member]
Business Acquisition [Line Items]
Asset acquisition payment			$ 325
Contingent and Regulatory Milestone Payments	$ 25	$ 25	2,000
Total Contingent Development and Regulatory Milestone Payments	$ 555
Cormorant [Member]
Business Acquisition [Line Items]
Contingent and Regulatory Milestone Payments		$ 60
Cardioxyl Pharmaceuticals, Inc. [Member]
Business Acquisition [Line Items]
Contingent and Regulatory Milestone Payments			450
Research and Development Expense [Member] | IFM [Member]
Business Acquisition [Line Items]
Asset acquisition payment			$ 14