SUPPLEMENTAL FINANCIAL INFORMATION - Property, Plant and Equipment, Net (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost	$ 10,660	$ 10,333
Accumulated depreciation	(6,148)	(5,803)
Property, plant and equipment (PP&E), net	4,512	4,530		$ 4,485	$ 4,476	$ 4,476	$ 4,486	$ 4,576
Property, plant and equipment, purchases	87	97
Depreciation expense	606	602	$ 596
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost	148	142
Buildings and leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost	1,761	1,703
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost	6,671	6,423
Equipment with customers
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost	1,489	1,364
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost	$ 591	$ 701