PROPERTY, PLANT AND EQUIPMENT (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 4,229	$ 4,229	$ 3,970
Less: accumulated depreciation and amortization	(2,776)	(2,776)	(2,682)
Property, plant and equipment, net	1,453	1,453	1,288
Gain on sale recognized	72
Other Operating Income (Expense)
Property, Plant and Equipment [Line Items]
Gain on sale recognized	73	73
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	25	25	29
Building and Improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	341	341	429
Laboratory Equipment, Furniture and Fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	1,788	1,788	1,691
Leasehold Improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	639	639	606
Computer Software Developed or Obtained for Internal Use
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	1,106	1,106	1,013
Construction in Progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 330	$ 330	$ 202